यदि (n(U)=80) और (n(A')=19) है, तो (n(A)) कितना होगा?
If (n(U)=80) and (n(A')=19), what is (n(A))?
Explanation opens after your attempt
C. (61)
Concept
(A) and (A') together form the whole (U). So (n(A)=80-19=61).
Why this answer is correct
The correct answer is C. (61). (A) and (A') together form the whole (U). So (n(A)=80-19=61).
Exam Tip
(A) और (A') मिलकर पूरा (U) बनाते हैं। इसलिए (n(A)=80-19=61)।
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