SOLUTION: In a school of 600 students,the number of boys is 40 more than the number of girls.3/4 of boys and 5/7 of girls know chess.Find the number of students who know chess.

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Question 1110835: In a school of 600 students,the number of boys is 40 more than the number of girls.3/4 of boys and 5/7 of girls know chess.Find the number of students who know chess.
Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!

Hi
In a school of 600 students,the number of boys is 40 more than the number of girls.
Let x represent the number of girls:
x + (x+40) = 600
2x = 560
x = 280, number of Girls, 320 Boys
and
320 + 200 = 520 know how to play chess


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