allery100 छात्रों के एक समूह में, 60 क्रिकेट खेलते हैं, 50 फुटबॉल खेलते हैं, और 20 दोनों खेल खेलते हैं। कितने छात्र दोनों में से कोई भी खेल नहीं खेलते हैं?
A10
B20
C30
D40
Answer & Solution
Correct answer: A. 10
सम्मिलन = n(C) + n(F) - n(C ∩ F) = 60 + 50 - 20 = 90। कोई भी खेल न खेलने वाले छात्र = 100 - 90 = 10।
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