Question

A bag contains 4 white balls, 6 red balls, 7 black balls and 3 blue balls. One ball is drawn at random from the bag. What is the probability that the ball drawn is white?

Answer 1

Given: A bag contains 4 white, 6 red, 7 black and 3 blue balls (total 20).

Step-wise calculation:

1. Total number of balls

= 4 + 6 + 7 + 3

= 20

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

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

= `4/20`

= `1/5`

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