Question

A bag contains 4 white balls, 5 red balls and 8 black balls and 3 blue balls. A ball is drawn at random from the bag. Find the probability that the ball drawn is white.

Answer 1

Given: A bag contains 4 white, 5 red, 8 black and 3 blue balls.

Step-wise calculation:

1. Total number of balls

= 4 + 5 + 8 + 3

= 20

2. Number of favourable outcomes (white balls) = 4.

3. Probability = `"Number of favourable outcomes"/"Total number of outcomes"`

4. Probability = `4/20`

= `1/5`

= 0.2

The probability that the ball drawn is white is `1/5` or 0.2.