Question

A and B are two mutually exclusive events and P(A) – 0.3, P(B) = K and P(A ∪B) = 0.5, then find the value of K –

Answer 1

P(A ∪ B) = P(A) + P(B)

⇒ P{B) = P(A ∪ B) – P(A)

⇒ P(B) = K = 0.5 – 0.3

= 0.2

Thus K = 0.2.