defence exam CISF Constable Tradesman 2025 Mock Test Quantitative Aptitude Average

There are total 60 boys and girl in a hostel. The average age of the boys is 21 years and that of the girls is 24 years while the average age of all boys and girls is 22 years and 3 months. Find the number of boys in the hostel.

1
42
2
30
3
25
4
35
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