alleryஒரு விடுதியில், 60 மாணவர்கள் நாளிதழ் A-ஐயும், 50 பேர் நாளிதழ் B-ஐயும், 20 பேர் இரண்டையும் படிக்கின்றனர். நாளிதழ் A-ஐ மட்டுமே படிப்பவர்கள் எத்தனை பேர்?
A20
B30
C35
D40
Answer & Solution
Correct answer: D. 40
நாளிதழ் A மட்டுமே = n(A) - n(A ∩ B) = 60 - 20 = 40.
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