Arithmetichard · Past Paper
The ratio of the number of boys and girls in a college is 7:8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?
A21:22
B17:18
C8:9
D10:11
✓ Correct Answer: A — 21:22
New ratio = (7 * 1.20) : (8 * 1.10) = 8.4 : 8.8 = 84:88 = 21:22.
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