If the probability that A will live 15 year is 7/8 and that B will live 15 year is 9/10, then what is the probability that both will live after 15 year ?



If the probability that A will live 15 year is 78 and that B will live 15 year is 910, then what is the probability that both will live after 15 year ?

A. 1/20

B. 63/80

C. 1/5

D. None of these

Answer : B. 63/80


Explanation:

    P(A) = 7/8, P(B) = 9/10
    Required Probability = P(A) x P(B)
    = (7/8) x (9/10)
    = 63/80.


Related Searches to If the probability that A will live 15 year is 7/8 and that B will live 15 year is 9/10, then what is the probability that both will live after 15 year ?