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anahitah
10.09.2019 •
Mathematics
Two life insurance policies, each with a death benefit of 10,000 and a one-time premium of 500, are sold to a couple, one for each person. the policies will expire at the end of the tenth year. the probability that only the wife will survive at least ten years is 0.025, the probability that only the husband will survive at least ten years is 0.01, and the probability that both of them will survive at least ten years is 0.96 . what is the expected excess of premiums over claims, given that the husband survives at least ten years?
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Ответ:
896.9
Step-by-step explanation:
Let x denotes excess premium over claims
(i)Only husband survives
This can be possible with a possibility of 0.01
Claims=10,000
Premium collected![=2\times 500=1000](/tpl/images/0226/3865/48d4a.png)
Thus x=1000-10,000=-9000
(ii)Both husband and wife survives
This can occur with a probability of 0.96
Here claims will be 0 as both survives
Premium taken=1000
thus x=1000
The probability that the husband survives is the sum of above cases
=0.96+0.01=0.97
Hence the desired conditional Expectation![E\left ( x|Husband survives\right ) =0.01\times \left ( -9000\right )+0.96\times \left ( 1000\right )=896.9](/tpl/images/0226/3865/94ac1.png)
Ответ:
Step-by-step explanation: