allery72 छात्रों में से 40 गाते हैं, 32 नृत्य करते हैं और 12 दोनों करते हैं। दोनों में से कम से कम एक में कितने छात्र भाग लेते हैं?
A64
B60
C58
D66
Answer & Solution
Correct answer: B. 60
सम्मिलन (यूनियन) = 40 + 32 - 12 = 60 छात्र।
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