Posted by Mercedez on Tuesday, November 15, 2011 at 9:06pm.
There are 48 students in a school play. The ratio of boys to girls is 5:7. How many boys are in the school play? Explain how you found your answer.

7th grade math  Ms. Sue, Tuesday, November 15, 2011 at 9:15pm
I'd set up a proportion (ratio).
5/12 = b/48
12b = 240
b = 20

7th grade math  Mercedez, Tuesday, November 15, 2011 at 9:21pm
Where did you get the 5/12 from when it's 5/7?

7th grade math  Ms. Sue, Tuesday, November 15, 2011 at 9:24pm
You're comparing the number of boys with the total.
5 + 7 = 12

7th grade math  Anonymous, Tuesday, November 29, 2016 at 6:06am
A school has 1800 students on its roll 40% of whom are girls how many boys are there in the school

7th grade math  Blue, Friday, February 3, 2017 at 11:52am
on the question above the one with no answer i got that answer but my teacher says it is wrong who is right and how did you get this answer?
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