The number of boy ,girl in a class are in the ratio 7:5 the number of boy is 8 more than the number of girl. What is the total class strength
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Let the no. of girls be 5x
No. of boys=7x
According to the question
5x+8=7x
7x-5x=8
2x=8
x=8/2
x=4
No. of girls=5*4=20
no. of boys=7*4 or 5*4+8=28
Hence the total strength of the class is 20+28=48
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