# 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.