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algol13
3 years ago
12

A school has a ratio of 3 to 8 for boys to girls. If there are 132 students in the class, how many of them are boys?

Mathematics
1 answer:
Vsevolod [243]3 years ago
3 0

Answer:

36 boys.

Step-by-step explanation:

The ratio of boys to the total is

3/11.  Where did that 11 come from? You add the two components of the ratio to get the ratio of one of the genders to the total.

boys / total = 3 /(8 + 3) = 3/11

3/11 = x / 132           Cross multiply

3 * 132 = 11x            Divide by 11

3 * 132/11 = 11x/11     Simplify\

3 * 12 = x

x = 36

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