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
Correct Answer

B. (10)

Step 1

Concept

The number of ways to choose three elements is \(\binom{5}{3}=10\). Order is not counted in subsets.

Step 2

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.

Step 3

Exam Tip

तीन अवयव चुनने की संख्या \(\binom{5}{3}=10\) है। उपसमुच्चय में क्रम नहीं गिना जाता।

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Mathematics Answer, Explanation and Revision Hints

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?

Correct Answer: B. (10). Explanation: तीन अवयव चुनने की संख्या \(\binom{5}{3}=10\) है। उपसमुच्चय में क्रम नहीं गिना जाता। / The number of ways to choose three elements is \(\binom{5}{3}=10\). Order is not counted in subsets.

Which concept should I revise for this Mathematics MCQ?

The number of ways to choose three elements is \(\binom{5}{3}=10\). Order is not counted in subsets.

What exam hint can help solve this Mathematics question?

तीन अवयव चुनने की संख्या \(\binom{5}{3}=10\) है। उपसमुच्चय में क्रम नहीं गिना जाता।