यदि (A) में (5) सदस्य हैं, तो (A) के तीन-सदस्यीय उपसमुच्चयों की संख्या कितनी है?
If (A) has (5) elements, how many three-element subsets does (A) have?
Explanation opens after your attempt
B. (10)
Concept
The number of ways to choose three elements is \(\binom{5}{3}=10\). Order is not counted in subsets.
Why this answer is correct
The correct answer is B. (10). The number of ways to choose three elements is \(\binom{5}{3}=10\). Order is not counted in subsets.
Exam Tip
तीन सदस्य चुनने की संख्या \(\binom{5}{3}=10\) है। उपसमुच्चय में क्रम नहीं गिना जाता।
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