यदि \(A=\{a,b,c,d,e\}\) है तो (A) के ऐसे उपसमुच्चयों की संख्या क्या है जिनमें (a) न हो?
If \(A=\{a,b,c,d,e\}\), how many subsets of (A) do not contain (a)?
Explanation opens after your attempt
B. (16)
Concept
After excluding (a), four elements remain and they form \(2^4=16\) subsets. Remove the forbidden element first.
Why this answer is correct
The correct answer is B. (16). After excluding (a), four elements remain and they form \(2^4=16\) subsets. Remove the forbidden element first.
Exam Tip
(a) हटाने के बाद चार अवयव बचते हैं और उनसे \(2^4=16\) उपसमुच्चय बनते हैं। निषिद्ध अवयव को पहले बाहर करें।
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