यदि \(A=\{1,2,3,4\}\) है तो (A) के तीन अवयवों वाले उचित उपसमुच्चयों की संख्या क्या है?
If \(A=\{1,2,3,4\}\), how many proper subsets of (A) have exactly three elements?
Explanation opens after your attempt
Correct Answer
B. (4)
Concept
The number of ways to choose three elements is \(\binom{4}{3}=4\). All are proper because the whole set has four elements.
Why this answer is correct
The correct answer is B. (4). The number of ways to choose three elements is \(\binom{4}{3}=4\). All are proper because the whole set has four elements.
Exam Tip
तीन अवयव चुनने की संख्या \(\binom{4}{3}=4\) है। ये सभी उचित हैं क्योंकि पूरा समुच्चय चार अवयवों का है।
Login to save your score, XP, coins and progress.