The ratio of the number of boys to girls in a class is 3:2. If 10% of boys and 15% of girls are absent, what fraction of the total class is present? MCQ with Answer and Explanation
The ratio of the number of boys to girls in a class is 3:2. If 10% of boys and 15% of girls are absent, what fraction of the total class is present?
A. 17/25
B. 22/25
C. 87/100
D. 33/50
Answer: Option D
Solution (By JKSSB Mock Tests)
Total = 3k+2k=5k. Present boys=0.9×3k=2.7k, present girls=0.85×2k=1.7k, total present=4.4k. Fraction = 4.4k/5k = 44/50 = 22/25. So answer 22/25, option D. Wait, 4.4/5 = 0.88 = 22/25. So D. I'll set options accordingly.
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