the student to teacher ratio is 15:3. if there are 90 teachers at the school, how many students are there

asked Sep 23, 2015 175k views

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3 votes

90/3 = 30
30*15=450 Students

To check: 15:3 (divide by three)
5:1
So should be five times as many students.
90*5=450 :) Hope this helps :)

Owlvark answered Sep 24, 2015

7.2k points

2 votes

$15x+3x=90\\ 18x=90\\ x=5\\\\ 15x=15\cdot5=\boxed{75}$

Neverwinter answered Sep 28, 2015

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