SOLUTION: A school has 630 students. The ratio of the number of boys to the number of girls is 3:2. This ratio changes to 7:5 after the admission of 90 new students. Find the number of newly

Question 1086282: A school has 630 students. The ratio of the number of boys to the number of girls is 3:2. This ratio changes to 7:5 after the admission of 90 new students. Find the number of newly admitted boys.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
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A school has 630 students. The ratio of the number of boys to the number of girls is 3:2.
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girls, ,
boys,

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This ratio changes to 7:5 after the admission of 90 new students.
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b, boys added
g, girls added

-

------the added girls
-
-----the added boys
Answer by MathTherapy(10551) (Show Source): You can put this solution on YOUR website!

A school has 630 students. The ratio of the number of boys to the number of girls is 3:2. This ratio changes to 7:5 after the admission of 90 new students. Find the number of newly admitted boys.

Number of boys, initially:
With 90 students being added, the number of students become: 720 (630 + 90)
Number of boys after new admissions:
Number of newly admitted boys:
It is that easy! Nothing COMPLEX/CONFUSING!
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