यदि \(A=\{a,b,c,d,e\}\) है तो (A) के ठीक तीन अवयवों वाले उपसमुच्चयों की संख्या क्या है?
If \(A=\{a,b,c,d,e\}\) then what is the number of subsets of (A) having exactly three elements?
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 अवयव चुनने की संख्या \(\binom{5}{3}=10\) है। उपसमुच्चय में क्रम नहीं गिना जाता।
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