allery100 विद्यार्थ्यांच्या एका गटात, 60 जण क्रिकेट खेळतात, 50 जण फुटबॉल खेळतात आणि 20 जण दोन्ही खेळ खेळतात. दोन्हीपैकी एकही खेळ न खेळणारे किती विद्यार्थी आहेत?
A10
B20
C30
D40
Answer & Solution
Correct answer: A. 10
Union = n(C) + n(F) - n(C ∩ F) = 60 + 50 - 20 = 90. एकही खेळ न खेळणारे विद्यार्थी = 100 - 90 = 10.
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