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8 November, 07:01

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

A. 14

B. 28

C. 21

D. 12

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  1. 8 November, 07:06
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    21 students were in the class.

    Step-by-step explanation:

    The information in the question tells you that 4/7 of the class is girls.

    That means that the remainder of the class is 1 - 4/7 = 3/7 boys

    Let the total in the class = x

    (3/7) x = 9 Multiply by 7

    (3/7) * 7*x = 9 * 7 Simplify the right and left

    3x = 63 Divide by 3

    3x/3 = 63/3

    x = 21

    There were 21 students in the class.
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