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 red or blue.

Answer 1

Given: A bag has 4 white, 5 red, 8 black and 3 blue balls total 20 balls.

Step-wise calculation:

1. Total number of balls

= 4 + 5 + 8 + 3

= 20

2. Number of favorable outcomes (red or blue)

= 5 + 3

= 8

3. Required probability = `"Favorable"/"Total"`

= `8/20`

= `2/5`

= 0.4

= 40%

The probability that the ball drawn is red or blue is `2/5` (40%).