alleryIn a class of 50 students, 40% are girls. How many boys are there?
A30
B25
C20
D35
Answer & Solution
Correct answer: A. 30
1. Girls = 40% of 50 = 20.
2. Boys = 50 - 20 = 30.
3. So there are 30 boys.
_Source: SSC CGL Quantitative Aptitude (Percentages), R.S. Aggarwal style and standard practice_
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