Question

The probability that Skene will be alive in 5 years' time is ¾ and the probability that his wife Am in a will be alive in 5 years' time is 2/5. Find the probability that in 5 years' time (a) both of them will be alive (b) only Ekene will be alive Teachers in charge​

Answer 1

(a) 3/10

(b) 9/20

Explanation:

In order to answer this question, we must assume the probabilities are independent.

(a) p(both alive) = p(S alive)×p(A alive) = (3/4)(2/5) = 3/10

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(b) p(only S alive) = p(S alive)×p(A not alive) = (3/4)(1 -2/5) = 9/20