यदि (A) में (5) अवयव हैं तो (A) के ऐसे उपसमुच्चयों की संख्या क्या है जो (A) के बराबर नहीं हैं?
If (A) has (5) elements, how many subsets of (A) are not equal to (A)?
Explanation opens after your attempt
Correct Answer
C. (31)
Concept
Subsets not equal to (A) are proper subsets, and their number is \(2^5-1=31\). Only the whole set is removed once.
Why this answer is correct
The correct answer is C. (31). Subsets not equal to (A) are proper subsets, and their number is \(2^5-1=31\). Only the whole set is removed once.
Exam Tip
बराबर नहीं होने वाले उपसमुच्चय ही उचित उपसमुच्चय हैं और उनकी संख्या \(2^5-1=31\) है। पूरा समुच्चय केवल एक बार हटता है।
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