railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Average

In a school, the average height of the students of the tenth standard is 100 cm. The average height of boys is 118 cm. whereas the average height of girls is 95 cm. What is the number of girls in the class if there are 20 boys?

1
72
2
63
3
54
4
36
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