यदि (U) में (35) तत्व हैं और (A) में (12) तत्व हैं, तो (A') में कितने तत्व होंगे?
If (U) has (35) elements and (A) has (12) elements, how many elements will (A') have?
Explanation opens after your attempt
B. (23)
Concept
(n(A')=n(U)-n(A)=35-12=23). To find a complement, subtract the set size from the total size.
Why this answer is correct
The correct answer is B. (23). (n(A')=n(U)-n(A)=35-12=23). To find a complement, subtract the set size from the total size.
Exam Tip
(n(A')=n(U)-n(A)=35-12=23)। पूरक की गणना में कुल से दिए हुए समुच्चय को घटाते हैं।
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