यदि (n(\mathcal{P}(B))=128) है, तो (B) के उचित उपसमुच्चयों की संख्या कितनी होगी?
If (n(\mathcal{P}(B))=128), how many proper subsets does (B) have?
Explanation opens after your attempt
Correct Answer
C. (127)
Concept
There are (128) total subsets, and a proper subset does not include the whole set itself. So the number is (128-1=127).
Why this answer is correct
The correct answer is C. (127). There are (128) total subsets, and a proper subset does not include the whole set itself. So the number is (128-1=127).
Exam Tip
कुल उपसमुच्चय (128) हैं और उचित उपसमुच्चय में पूरा समुच्चय नहीं गिना जाता। इसलिए संख्या (128-1=127) होगी।
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