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 red or white?

Answer 1

Given: A bag has 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 (red or white)

= 6 + 4

= 10

3. Probability = `"Favourable"/"Total"`

= `10/20`

= `1/2`

The probability that the drawn ball is red or white is `1/2`.