एक कक्षा के (80) विद्यार्थियों में (46) क्रिकेट खेलते हैं, (38) फुटबॉल खेलते हैं और (20) दोनों खेलते हैं। कोई भी खेल न खेलने वाले विद्यार्थियों की संख्या कितनी है?
In a class of (80) students, (46) play cricket, (38) play football, and (20) play both. How many students play neither game?
Explanation opens after your attempt
Correct Answer
B. (16)
Concept
\(|C\cup F|=46+38-20=64\), so those playing neither are (|\(C\cup F\)'|=80-64=16). Read neither as the complement of the union.
Why this answer is correct
The correct answer is B. (16). \(|C\cup F|=46+38-20=64\), so those playing neither are (|\(C\cup F\)'|=80-64=16). Read neither as the complement of the union.
Exam Tip
\(|C\cup F|=46+38-20=64\), इसलिए न कोई खेल खेलने वाले (|\(C\cup F\)'|=80-64=16) हैं। neither को संघ के पूरक के रूप में पढ़ें।
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