allery50 জন সদস্যের একটি ক্লাবে 28 জন দাবা খেলেন, 24 জন ক্যারম খেলেন এবং 8 জন কোনোটিই খেলেন না। কতজন উভয় খেলাই খেলেন?
A10
B12
C14
D16
Answer & Solution
Correct answer: A. 10
Union = 50 - 8 = 42। উভয় খেলা খেলেন = n(Chess) + n(Carrom) - Union = 28 + 24 - 42 = 10।
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