At summer camp the ratio of boys to girls was 7:2 If there were 21 boys how many girls were there?

1 answer:

3 0

$Ratio:\\7:2\\\\
7x-number\ of\ boys\\2x-number\ of\ boys\\\\
7x=21\ \ \ |:7\\
x=3\\\\
2x=2*3=6\\
Number\ of\ girls\ is\ equal\ to\ 6.$

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