Question

If A and B are any two events such that P(A) + P(B) – P(A and B) = P(A), then.

विकल्प

• P(B/A) = 1

• P(A/B) = 1

• P(B/A) = 0

• P(A/B) = 0

Answer 1

P(A/B) = 1

Explanation:

P(A) + P(B) – P(A ∩ B) = P(A)

⇒ P(B) – P(A ∩ B) = 0

or P(A ∩ B) = P(B) or `(P(A ∩ B))/(P(B))` = 1

i.e., P(A/B) = 1