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

Mathematics

2 answers:

mixas84 [53]3 years ago

8 0

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

svp [43]3 years ago

6 0

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 :)

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