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Lynna [10]
3 years ago
13

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

Mathematics
1 answer:
sergeinik [125]3 years ago
3 0

Answer:

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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