Question

A bag contains 4 white and 3 black balls. If two balls are drawn simultaneously, then the probability that the balls are of same colour is

• A. 1/7
• B. 2/7
• C. 3/7
• D. 4/7

Answer 1

Answer: (C)

3/7

Answer 2

Let E₁ be the event of drawing balls of same colour.

N(E₁) = 4C2 + 3C2.

P(E₁) = .