allery100 জনের একটি দলে 60 জন সাঁতার কাটেন, 45 জন সাইকেল চালান এবং 15 জন কোনটিই করেন না। কতজন উভয়ই করেন?
A20
B25
C15
D30
Answer & Solution
Correct answer: A. 20
85 জন অন্তত একটি কাজ করেন, সুতরাং উভয়ই করেন = 60 + 45 - 85 = 20।
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