यदि \(A=\{a,b,c,d,e\}\), तो (P(A)) के कितने अवयव (a) और (b) दोनों को शामिल करते हैं?
If \(A=\{a,b,c,d,e\}\), how many elements of (P(A)) contain both (a) and (b)?
Explanation opens after your attempt
Correct Answer
B. (8)
Concept
(a,b) are fixed, and the remaining (3) elements have \(2^3=8\) choices. When both are compulsory, place them first.
Why this answer is correct
The correct answer is B. (8). (a,b) are fixed, and the remaining (3) elements have \(2^3=8\) choices. When both are compulsory, place them first.
Exam Tip
(a,b) स्थिर हैं और शेष (3) अवयवों के \(2^3=8\) चयन हो सकते हैं। दोनों अनिवार्य हों तो उन्हें पहले रख लें।
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