NCERT Class XII Mathematics Chapter - - Solutions

Question : 83

Total: 101

..... Miscellaneous Exercise .....

A and B are two events such that P(A) ≠ 0. Find P(B|A), if
(i) A is a subset of B
(ii) A ∩ B = ϕ

Solution:

(i) P(B|A)=

P(A∩B)

P(A)

=1 (∵ A ⊂ B ⇒ A ∩ B = A)
(ii) (i) P(B|A)=

P(A∩B)

P(A)

=0 (∵ A ∩ B = ϕ ⇒ P(A ∩ B) = 0)

Go to Question:

Prev Question

Next Question