b) In a play school, there are 16 red balls and the rest are white balls. The ratio of red balls to white balls is 4:5. Find the number of white balls.

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Answered on Wed Apr 27 2022

Given :

Number of red balls = 16

Ratio of red and white balls = 4:5

Let the common factor of ratio be x, then

Red balls = 4x and white balls = 5x

4x = 16

x = 16/4

x = 4

Then, white balls = 5x

= 5 × 4

= 20

Hence, number of white balls is 20