# 30 girls and boys have planned for a picnic. There is a ratio of 3 girls to 7 boys. How many boys are there?

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by joshua13

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by joshua13

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Given ratio of girls and boys =3:7

let the number of girls be 3x and boys be 7x

we know that the total number of boys and girls is 30

thus,

3x+7x=30

10x=30

x=30/10

x=3

therefore ,the number of boys =7x=7(3)=21

let the number of girls be 3x and boys be 7x

we know that the total number of boys and girls is 30

thus,

3x+7x=30

10x=30

x=30/10

x=3

therefore ,the number of boys =7x=7(3)=21

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.

3x + 7x = 30

10x = 30