यदि \(A=\{p,q,r,s,t,u\}\) है, तो (A) के ऐसे कितने उपसमुच्चय हैं जिनमें कम से कम (5) तत्व हों?
If \(A=\{p,q,r,s,t,u\}\), how many subsets of (A) contain at least (5) elements?
Explanation opens after your attempt
Correct Answer
B. (7)
Concept
At least (5) means (5) or (6) elements. The number is \(\binom{6}{5}+\binom{6}{6}=6+1=7\).
Why this answer is correct
The correct answer is B. (7). At least (5) means (5) or (6) elements. The number is \(\binom{6}{5}+\binom{6}{6}=6+1=7\).
Exam Tip
कम से कम (5) का अर्थ (5) या (6) तत्व है। संख्या \(\binom{6}{5}+\binom{6}{6}=6+1=7\) है।
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