Paper 1 · Mathematical Reasoning and Aptitude
If 75% of the students in a school are boys and the number of girls is 420, then the number of boys is
A1176
B1350
C1260 ✓ Correct
D1125
Correct answer: (C) 1260 — The number of boys is 1260, so that is the answer.
Explanation
★The number of boys is 1260, so that is the answer.
★If 75 per cent are boys, then 25 per cent are girls.
★The 25 per cent who are girls number 420.
★So 1 per cent is 420 divided by 25, which is 16.8, and the total is 16.8 times 100, that is 1680.
★Boys are 75 per cent of 1680.
★This gives 1260 boys.
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