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The ratio of the number of boys to the number of girls in a class is 5 to 7. How many boys are there if there are 21 girls?

The ratio of the number of boys to the number of girls in a class is 5 to 7. How many boys are there if there are 21 girls?
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The ratio of the number of boys to the number of girls in a class is 5 to 7. How many boys are there if there are 21 girls?

asked
User Mrtpk
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8.5k points

1 Answer

0 votes
5/7 = b/21
105/7 = b
15 = b

15 boys
answered
User Christopher Nolan
by
7.5k points
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