Question

A bag contains 25 balls. Some of them are yellow and others are green. One ball is drawn at random. If probability of getting a green ball is `3/5`, then find the number of yellow balls.

Answer 1

Total number of balls in the bag = 25.

Let the number of green balls be G.

Given, P(Green ball) = `3/5`

`G/25 = 3/5`

Cross-multiplying to find G:

`G = 3/5 xx 25`

= 3 × 5

= 15

The number of green balls is 15.

Since the rest are yellow balls, the number of yellow balls is:

Number of yellow balls = Total balls – Green balls

Number of yellow balls = 25 – 15 = 10

The number of yellow balls is 10.