Question 1014368
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in a class 60 children, 30% are girl. how many boys are there how to solve this question. 
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Since 30% are girls, then 70% are boys. Is it clear?


Now, 70% of 60 is {{{70/100}}} of 60, or {{{(70/100)*60}}} = {{{(7/10)*60}}} = {{{(7*60)/10}}} = 7*6 = 42.