Question
There were 30 pupils in a class. 12 of the girls and 16 of the boys did not wear hats. Given that 21 pupils who wore hats, how many boys were there in the class?
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There were 30 pupils in a class. 12 of the girls and 16 of the boys did not wear hats. Given that 21 pupils who wore hats, how many boys were there in the class?