The ratio of adults to children at a concert is expected to be 2 to 5. If 200 people attend, how many are expected to be children?

Mathematics · Middle School · Mon Jan 18 2021

Answered on

Given : 

Ratio of adults to children = 2:5

Let the common factor of ratio be x 

Then, ratio of adults to children = 2x : 5x

So,

2x + 5x = 200

7x = 200

x = 200/7

x = 28.57

So, Number of children = 5x

= 5 × 28.57

= 142.85 or 143

 

Hence, number of children expected to attend concert is 143.