Question

If 'A' and 'B' are events such that `P(A/B) = P(B/A)` then:-

Options

• A ⊂ B

• B = A

• A ∩ B = `phi`

• P(A) = P(B)

Answer 1

P(A) = P(B)

Explanation:

`P(A/B) = P(B/A)`

⇒ `(P(A ∩ B))/(P(B)) = (P(A ∩ B))/(P(A))`

= P(A) = P(B)