Question 471165
If 12 out of 27 are girls,
then 15 out of 27 are boys.
There are 990 total.


15 boys / 27 total = x boys / 990 total {set up a proportion}
27x = 15(990) {cross-multiplied}
27x = 14,850 {multiplied 15 by 990}
x = 550


there are 550 boys
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