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In a class of 80 students, 60% are girls. If 12 more boys join, what is the new percentage of boys?
A40%
B42%
C44%
D47.83%
Answer & Solution
Correct answer: D. 47.83%
1. Original boys = 40% × 80 = 32. Girls = 48.
2. After 12 more boys: total boys = 44, total class = 92.
3. % boys = 44 / 92 × 100 ≈ 47.83%.
_Source: jkchrome Percentage QB, p.5 — composition change_
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