The probability that an 80-year-old male in the U.S. will die within one year is approximately 0.069941. If an insurance company sells a one-year, $14,000 life insurance policy to such a person for $455, what is the company's expectation? (Round your answer to two decimal places.)
Given that, Probability that an 80-year-old male I'm the U.S. will die within one year is approximately 0.069941
That is, P(die) = 0.069941
=> P(survive) = 1 - 0.069941 = 0.930059
If 80-year-old man die within one year then insurance company have to pay ($14000 - $455 = $13545) (loss for insurance company is $13545) and if he survive then company gets, $455.
Let X be a profit and loss of insurance company.
X (profit or loss in $) | P(x) |
---|---|
-13545 | 0.069941 |
455 | 0.930059 |
Then the expected value of X is,
E(X) = (-13545 * 0.069941) + (455 * 0.930059)
=> E(X) = -947.350845 + 423.176845
=> E(X) = -524.174
=> E(X) = -524.17 (rounded to two decimal places)
Therefore, the company's expectation is -$524.17
Note : Another method is,
If old man dies insurance company have to pay $14000 otherwise company will get $455.
Therefore, expected loss/profit for the insurance company is,
(-14000 * 0.069941) + 455 = -979.174 + 455 = -524.174
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