यदि (U) में (60) विद्यार्थी हैं और (A) में (18) विद्यार्थी संगीत सीखते हैं, तो संगीत न सीखने वाले विद्यार्थियों की संख्या क्या है?
If (U) has (60) students and (A) has (18) students learning music, what is the number of students not learning music?
Explanation opens after your attempt
A. (42)
Concept
Students not learning music are in \(A^c\). Therefore the number is (60-18=42).
Why this answer is correct
The correct answer is A. (42). Students not learning music are in \(A^c\). Therefore the number is (60-18=42).
Exam Tip
संगीत न सीखने वाले \(A^c\) में हैं। इसलिए संख्या (60-18=42) है।
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