allery70 জনের একটি দলে, 40 জন P পত্রিকা পড়েন, 30 জন Q পত্রিকা পড়েন এবং 10 জন উভয় পত্রিকাই পড়েন। কতজন ঠিক একটি পত্রিকা পড়েন?
A55
B50
C40
D45
Answer & Solution
Correct answer: B. 50
ঠিক একটি = (40 - 10) + (30 - 10) = 50।
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