in a class of 42 students boys are 2/5 of the girls find the number of boys and girls
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let girls no = x
then,boys bo = 2/5 of x
according to question,
x+2x/5=42
7x/5=42
so x =42×5÷7
x=30
girls no = 30
boys no =12
then,boys bo = 2/5 of x
according to question,
x+2x/5=42
7x/5=42
so x =42×5÷7
x=30
girls no = 30
boys no =12
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