allery60 மாணவர்கள் உள்ள ஒரு வகுப்பில், 35 பேருக்குக் கணிதமும், 30 பேருக்கு அறிவியலும், 15 பேருக்கு இரண்டும் பிடிக்கும். கணிதம் மட்டுமே பிடிப்பவர்கள் எத்தனை பேர்?
A15
B20
C25
D30
Answer & Solution
Correct answer: B. 20
கணிதம் மட்டுமே = n(Math) - n(Math ∩ Science) = 35 - 15 = 20.
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