Question

If a classroom contains 35 students, 2/5 of which are girls, then how many boys are in the class? 16

Answer 1

Total number of students = 35
Fraction of girls = 2/5
Number of girls = 2/5 * 35 = 14

Therefore,
Number of boys = 35-14 = 21


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Answer 2

Total students=35
2/5 of 35= Girls
2*7=Girls
14=Girls

Now,
Total students - No. Of girls=Boys
35-14=21=boys