Paper 1 · Mathematical Reasoning and Aptitude
If 40% of people read newspaper X, 50% read newspaper Y, and 10% read both, what percentage read neither newspaper?
A10%
B15%
C20% ✓ Correct
D25%
Correct answer: (C) 20% — 20% read neither newspaper, so that is the answer.
Explanation
★20% read neither newspaper, so that is the answer.
★The percentage reading at least one paper is 40 plus 50 minus the 10 counted twice.
★That is 40 plus 50 minus 10, which is 80%.
★So 80% read at least one newspaper.
★The rest read neither, that is 100 minus 80.
★This gives 20%.
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