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Sati [7]
3 years ago
9

If the ratio of boys to girls at the school is 2:5, and there are 40 boys, how many girls are there?

Mathematics
1 answer:
lidiya [134]3 years ago
6 0

Answer:

<h3>There are 100 girls in the school</h3>

Step-by-step explanation:

Let the total number of people be x

To find the number of girls in the class we must first find the total number of people in the class

First find the total parts

That's

2 + 5 = 7

2/7 of the total number of people are boys

So we have

2/7 × x = 40

Multiply through by 7

2x = 280

Divide both sides by 2

x = 140

There are 140 people in the school

Finding the number of girls we have

5/7 × 140

= 100

There are 100 girls in the school

Hope this helps you

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