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17 April, 20:56

The ratio of boys to girls in a class room is 5 to 7. If there are 30 boys then how many girls are there

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Answers (2)
  1. 17 April, 23:08
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    The answer would be 42 girls
  2. 17 April, 23:17
    0
    The ratio of boys to girls to 5:7

    Let the number of boys be 5x

    Let the number of girls be 7x

    5x = 30

    x = 6

    Now just plug in 6 for the x in 7x

    and number of girls 7 x 6 = 42
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