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24 May, 00:31

In math class the girl to boy ratio is 3to 6 if there are 15 girls how many boys are there?

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Answers (2)
  1. 24 May, 01:22
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    Proprtions

    3 / 6 = 15 / x

    so 15 * 6 = 90

    divide by 3 and get 30 boys
  2. 24 May, 04:14
    0
    Another way at looking at it is, for every 3 girls, there are 6 boys or equal to that is a 1:2 ratio. So if there are 15 girls and twice as many guys, there will be 30 guys
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