SOLUTION: In a school, 5/7 of the students are boy. If there are 300 girls, find the number of boys in the school.

Question 962399: In a school, 5/7 of the students are boy. If there are 300 girls, find the number of boys in the school.
Found 2 solutions by macston, MathTherapy:
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
If 5/7 are boys, 2/7 are girls so (2/7)(100%)=28.57% are girls.
So 300 is 28.57% of: 300/0.2857=1050
There are a total of 1050 students
And 5/7 are boys: 5/7(1050)=750 ANSWER: There are 750 boys in the school.
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

In a school, 5/7 of the students are boy. If there are 300 girls, find the number of boys in the school.

As of students are boys, then of students are girls.
Let number of boys be B
Then we get:
------- Cross-multiplying

1500 = 2B ------- Denominators are equal and so are the numerators
B, or number of boys = , or
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