the number of boys and girls in a class is in the ratio7:5.the number of boys is 8 more than the number of girls.what is the total class strength
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Let the number of boys be B
Let the number of girls be G
B:G = 7:5
5B = 7G
The question says B = G + 8 , therefore :
5(G+8) = 7G
5G + 40 = 7G
G = 20 , B = 28
Total Strength = B+G = 48
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