: Help..............In a school a certain number of boys and girls attend a certain examination. The mean mark of the boys was 40 and the mean mark of the girls was 60.Mean of all students is 48.Find the number of boys and girls in a class of 100.

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(40x+60y)/100=48
x+y=100

solve two simoultaneous eq

boys r 60, galx 100

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