Question

A bag contains 3 white, 4 red and 5 black balls. One ball is drawn at random. What is the probability that the ball drawn is neither black nor white?

Options

• `1/4`

• `1/2`

• `1/3`

• `3/4`

Answer 1

`1/3`

Explanation:

Total possible outcomes = Total number of balls = ( 3 + 4 + 5) = 12 

Total number of balls that are non-black and non-white  = 4

 ∴ P (getting a ball that is neither black nor white)  = `4/12 = 1/3`