यदि \(A=\{2,4,6,8,10\}\) है, तो (\mathcal{P}(A)) में ठीक (2) तत्व वाले समुच्चयों की संख्या कितनी है?
If \(A=\{2,4,6,8,10\}\), how many sets in (\mathcal{P}(A)) have exactly (2) elements?
Explanation opens after your attempt
B. (10)
Concept
The number of ways to choose exactly (2) elements is \(\binom{5}{2}=10\). Each choice becomes an element of the power set.
Why this answer is correct
The correct answer is B. (10). The number of ways to choose exactly (2) elements is \(\binom{5}{2}=10\). Each choice becomes an element of the power set.
Exam Tip
ठीक (2) तत्व चुनने की संख्या \(\binom{5}{2}=10\) है। हर चयन घात समुच्चय का एक तत्व बनता है।
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