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8 April, 09:12

4/7 of the students in a classroom are girls. If there are nine boys in the class, how many total students are there?

14

28

21

12

+2
Answers (1)
  1. 8 April, 13:01
    0
    4/7 are girls ... that means 3/7 are boys ...

    3/7x = 9

    x = 9 * 7/3

    x = 63/3

    x = 21 < = = = there are 21 total students ... 9 boys and 12 girls
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