Finding the value of H when it is given a survival function. Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)How to derive the closed form of the sum of $kr^k$Poisson distribution question attemptThe mean of a continuous random variable that has a discontinuity in its densityThe probability of two consecutive non-leap years having 52 Fridays each is $frac57$. How?Bayes Theorem - Having trouble applying itInterest rate, probability of tuitionZero coupon bond linked with an annuity certain anually in advanceProbability that the fox will survive the huntProbability of Sums of Battery Lifeprobability that he is NOT killed in $20$ yearsConditional Probability — Hint needed.

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Finding the value of H when it is given a survival function.



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 00:00UTC (8:00pm US/Eastern)How to derive the closed form of the sum of $kr^k$Poisson distribution question attemptThe mean of a continuous random variable that has a discontinuity in its densityThe probability of two consecutive non-leap years having 52 Fridays each is $frac57$. How?Bayes Theorem - Having trouble applying itInterest rate, probability of tuitionZero coupon bond linked with an annuity certain anually in advanceProbability that the fox will survive the huntProbability of Sums of Battery Lifeprobability that he is NOT killed in $20$ yearsConditional Probability — Hint needed.










0












$begingroup$


Given $$S(x) = 1 - fracx120, x in [0, 120].$$



If Thomas dies (now he is 30 years old), his family will get $1000000$ with probability $0.2$. At the beginning of each year Thomas pays premium H with probability $0.8$. $v = frac 1 1.06.$



Next in the formulas: $ _kp_x = frac S(k+30) S(30).$



Determine the premium intensity $H$ by adopting the equivalence principle.



My solution:



$H = frac 0.2 times 1000000 times A_30 0.8 times ddot a_30$.



The problem is that I cannot calculate $ddot a_30$ or $A_30$, because the formulas are:



$ddot a_30 = sum_k=0^∞ v^k times _kp_30$ or



$A_30 = sum_k=0^∞ v^k+1 times _kp_30 times q_30+k.$



So here I have an infinity. I need to find one of these values at least, because I can find the second value using formula $ddot a_30 = frac 1 - A_30 1-v$. But I do not know how to do that (probably the $S(x)$ need to be used). Maybe I do not know some formulas.



The answer have to be $H=3195.$










share|cite|improve this question











$endgroup$











  • $begingroup$
    I am not able to relate $S(x)$ with the sum his family gets or the probability with which they will. What am I missing here? Nor do I understand the terms $A_30$ and $ddota_30$ in your solution. Can you add some prose to describe them?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:26











  • $begingroup$
    S(x) can be related only with $_kp_30 = frac s(30+k) S(30).$
    $endgroup$
    – Philip
    Mar 27 at 16:29











  • $begingroup$
    OK..... so what's that?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:30










  • $begingroup$
    The fraction for finding H is correct, my professor started solving this exercise.
    $endgroup$
    – Philip
    Mar 27 at 16:31










  • $begingroup$
    I have a problem only with calculating that sum from 0 to infinity, I am not getting the value.
    $endgroup$
    – Philip
    Mar 27 at 16:33















0












$begingroup$


Given $$S(x) = 1 - fracx120, x in [0, 120].$$



If Thomas dies (now he is 30 years old), his family will get $1000000$ with probability $0.2$. At the beginning of each year Thomas pays premium H with probability $0.8$. $v = frac 1 1.06.$



Next in the formulas: $ _kp_x = frac S(k+30) S(30).$



Determine the premium intensity $H$ by adopting the equivalence principle.



My solution:



$H = frac 0.2 times 1000000 times A_30 0.8 times ddot a_30$.



The problem is that I cannot calculate $ddot a_30$ or $A_30$, because the formulas are:



$ddot a_30 = sum_k=0^∞ v^k times _kp_30$ or



$A_30 = sum_k=0^∞ v^k+1 times _kp_30 times q_30+k.$



So here I have an infinity. I need to find one of these values at least, because I can find the second value using formula $ddot a_30 = frac 1 - A_30 1-v$. But I do not know how to do that (probably the $S(x)$ need to be used). Maybe I do not know some formulas.



The answer have to be $H=3195.$










share|cite|improve this question











$endgroup$











  • $begingroup$
    I am not able to relate $S(x)$ with the sum his family gets or the probability with which they will. What am I missing here? Nor do I understand the terms $A_30$ and $ddota_30$ in your solution. Can you add some prose to describe them?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:26











  • $begingroup$
    S(x) can be related only with $_kp_30 = frac s(30+k) S(30).$
    $endgroup$
    – Philip
    Mar 27 at 16:29











  • $begingroup$
    OK..... so what's that?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:30










  • $begingroup$
    The fraction for finding H is correct, my professor started solving this exercise.
    $endgroup$
    – Philip
    Mar 27 at 16:31










  • $begingroup$
    I have a problem only with calculating that sum from 0 to infinity, I am not getting the value.
    $endgroup$
    – Philip
    Mar 27 at 16:33













0












0








0





$begingroup$


Given $$S(x) = 1 - fracx120, x in [0, 120].$$



If Thomas dies (now he is 30 years old), his family will get $1000000$ with probability $0.2$. At the beginning of each year Thomas pays premium H with probability $0.8$. $v = frac 1 1.06.$



Next in the formulas: $ _kp_x = frac S(k+30) S(30).$



Determine the premium intensity $H$ by adopting the equivalence principle.



My solution:



$H = frac 0.2 times 1000000 times A_30 0.8 times ddot a_30$.



The problem is that I cannot calculate $ddot a_30$ or $A_30$, because the formulas are:



$ddot a_30 = sum_k=0^∞ v^k times _kp_30$ or



$A_30 = sum_k=0^∞ v^k+1 times _kp_30 times q_30+k.$



So here I have an infinity. I need to find one of these values at least, because I can find the second value using formula $ddot a_30 = frac 1 - A_30 1-v$. But I do not know how to do that (probably the $S(x)$ need to be used). Maybe I do not know some formulas.



The answer have to be $H=3195.$










share|cite|improve this question











$endgroup$




Given $$S(x) = 1 - fracx120, x in [0, 120].$$



If Thomas dies (now he is 30 years old), his family will get $1000000$ with probability $0.2$. At the beginning of each year Thomas pays premium H with probability $0.8$. $v = frac 1 1.06.$



Next in the formulas: $ _kp_x = frac S(k+30) S(30).$



Determine the premium intensity $H$ by adopting the equivalence principle.



My solution:



$H = frac 0.2 times 1000000 times A_30 0.8 times ddot a_30$.



The problem is that I cannot calculate $ddot a_30$ or $A_30$, because the formulas are:



$ddot a_30 = sum_k=0^∞ v^k times _kp_30$ or



$A_30 = sum_k=0^∞ v^k+1 times _kp_30 times q_30+k.$



So here I have an infinity. I need to find one of these values at least, because I can find the second value using formula $ddot a_30 = frac 1 - A_30 1-v$. But I do not know how to do that (probably the $S(x)$ need to be used). Maybe I do not know some formulas.



The answer have to be $H=3195.$







probability






share|cite|improve this question















share|cite|improve this question













share|cite|improve this question




share|cite|improve this question








edited Mar 27 at 16:51







Philip

















asked Mar 27 at 16:10









PhilipPhilip

917




917











  • $begingroup$
    I am not able to relate $S(x)$ with the sum his family gets or the probability with which they will. What am I missing here? Nor do I understand the terms $A_30$ and $ddota_30$ in your solution. Can you add some prose to describe them?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:26











  • $begingroup$
    S(x) can be related only with $_kp_30 = frac s(30+k) S(30).$
    $endgroup$
    – Philip
    Mar 27 at 16:29











  • $begingroup$
    OK..... so what's that?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:30










  • $begingroup$
    The fraction for finding H is correct, my professor started solving this exercise.
    $endgroup$
    – Philip
    Mar 27 at 16:31










  • $begingroup$
    I have a problem only with calculating that sum from 0 to infinity, I am not getting the value.
    $endgroup$
    – Philip
    Mar 27 at 16:33
















  • $begingroup$
    I am not able to relate $S(x)$ with the sum his family gets or the probability with which they will. What am I missing here? Nor do I understand the terms $A_30$ and $ddota_30$ in your solution. Can you add some prose to describe them?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:26











  • $begingroup$
    S(x) can be related only with $_kp_30 = frac s(30+k) S(30).$
    $endgroup$
    – Philip
    Mar 27 at 16:29











  • $begingroup$
    OK..... so what's that?
    $endgroup$
    – Balakrishnan Rajan
    Mar 27 at 16:30










  • $begingroup$
    The fraction for finding H is correct, my professor started solving this exercise.
    $endgroup$
    – Philip
    Mar 27 at 16:31










  • $begingroup$
    I have a problem only with calculating that sum from 0 to infinity, I am not getting the value.
    $endgroup$
    – Philip
    Mar 27 at 16:33















$begingroup$
I am not able to relate $S(x)$ with the sum his family gets or the probability with which they will. What am I missing here? Nor do I understand the terms $A_30$ and $ddota_30$ in your solution. Can you add some prose to describe them?
$endgroup$
– Balakrishnan Rajan
Mar 27 at 16:26





$begingroup$
I am not able to relate $S(x)$ with the sum his family gets or the probability with which they will. What am I missing here? Nor do I understand the terms $A_30$ and $ddota_30$ in your solution. Can you add some prose to describe them?
$endgroup$
– Balakrishnan Rajan
Mar 27 at 16:26













$begingroup$
S(x) can be related only with $_kp_30 = frac s(30+k) S(30).$
$endgroup$
– Philip
Mar 27 at 16:29





$begingroup$
S(x) can be related only with $_kp_30 = frac s(30+k) S(30).$
$endgroup$
– Philip
Mar 27 at 16:29













$begingroup$
OK..... so what's that?
$endgroup$
– Balakrishnan Rajan
Mar 27 at 16:30




$begingroup$
OK..... so what's that?
$endgroup$
– Balakrishnan Rajan
Mar 27 at 16:30












$begingroup$
The fraction for finding H is correct, my professor started solving this exercise.
$endgroup$
– Philip
Mar 27 at 16:31




$begingroup$
The fraction for finding H is correct, my professor started solving this exercise.
$endgroup$
– Philip
Mar 27 at 16:31












$begingroup$
I have a problem only with calculating that sum from 0 to infinity, I am not getting the value.
$endgroup$
– Philip
Mar 27 at 16:33




$begingroup$
I have a problem only with calculating that sum from 0 to infinity, I am not getting the value.
$endgroup$
– Philip
Mar 27 at 16:33










1 Answer
1






active

oldest

votes


















0












$begingroup$

Given that,
$$
ddota_30 = sum_k=0^inftyleft(frac11.06right)^k times fracS(30+k)S(30)
$$



Now as $S(30) = 0.75$, the sum is,
$$
ddota_30 = frac10.75left( sum_k=0^infty left(frac11.06right)^k left( 1 - frac30+k120right) right)=left( sum_k=0^infty left(frac11.06right)^k - frac190 sum_k=0^infty kleft(frac11.06right)^k right)
$$



The first sum is a sum to $infty$ of a GP. The second sum can be obtained from How to derive the closed form of the sum of $kr^k$
?






share|cite|improve this answer











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    1 Answer
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    active

    oldest

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    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    0












    $begingroup$

    Given that,
    $$
    ddota_30 = sum_k=0^inftyleft(frac11.06right)^k times fracS(30+k)S(30)
    $$



    Now as $S(30) = 0.75$, the sum is,
    $$
    ddota_30 = frac10.75left( sum_k=0^infty left(frac11.06right)^k left( 1 - frac30+k120right) right)=left( sum_k=0^infty left(frac11.06right)^k - frac190 sum_k=0^infty kleft(frac11.06right)^k right)
    $$



    The first sum is a sum to $infty$ of a GP. The second sum can be obtained from How to derive the closed form of the sum of $kr^k$
    ?






    share|cite|improve this answer











    $endgroup$

















      0












      $begingroup$

      Given that,
      $$
      ddota_30 = sum_k=0^inftyleft(frac11.06right)^k times fracS(30+k)S(30)
      $$



      Now as $S(30) = 0.75$, the sum is,
      $$
      ddota_30 = frac10.75left( sum_k=0^infty left(frac11.06right)^k left( 1 - frac30+k120right) right)=left( sum_k=0^infty left(frac11.06right)^k - frac190 sum_k=0^infty kleft(frac11.06right)^k right)
      $$



      The first sum is a sum to $infty$ of a GP. The second sum can be obtained from How to derive the closed form of the sum of $kr^k$
      ?






      share|cite|improve this answer











      $endgroup$















        0












        0








        0





        $begingroup$

        Given that,
        $$
        ddota_30 = sum_k=0^inftyleft(frac11.06right)^k times fracS(30+k)S(30)
        $$



        Now as $S(30) = 0.75$, the sum is,
        $$
        ddota_30 = frac10.75left( sum_k=0^infty left(frac11.06right)^k left( 1 - frac30+k120right) right)=left( sum_k=0^infty left(frac11.06right)^k - frac190 sum_k=0^infty kleft(frac11.06right)^k right)
        $$



        The first sum is a sum to $infty$ of a GP. The second sum can be obtained from How to derive the closed form of the sum of $kr^k$
        ?






        share|cite|improve this answer











        $endgroup$



        Given that,
        $$
        ddota_30 = sum_k=0^inftyleft(frac11.06right)^k times fracS(30+k)S(30)
        $$



        Now as $S(30) = 0.75$, the sum is,
        $$
        ddota_30 = frac10.75left( sum_k=0^infty left(frac11.06right)^k left( 1 - frac30+k120right) right)=left( sum_k=0^infty left(frac11.06right)^k - frac190 sum_k=0^infty kleft(frac11.06right)^k right)
        $$



        The first sum is a sum to $infty$ of a GP. The second sum can be obtained from How to derive the closed form of the sum of $kr^k$
        ?







        share|cite|improve this answer














        share|cite|improve this answer



        share|cite|improve this answer








        edited Mar 27 at 17:50

























        answered Mar 27 at 17:07









        Balakrishnan RajanBalakrishnan Rajan

        15210




        15210



























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