यदि \(U={1,2,\ldots,18}\), (A'={2,3,5,7,11,13,17}), तो (A) में कितने अवयव हैं?
If \(U={1,2,\ldots,18}\), (A'={2,3,5,7,11,13,17}), how many elements are in (A)?
Explanation opens after your attempt
C. (11)
Concept
(|U|=18) and (|A'|=7), so (|A|=18-7=11). The count of a set is obtained by subtracting its complement from the total.
Why this answer is correct
The correct answer is C. (11). (|U|=18) and (|A'|=7), so (|A|=18-7=11). The count of a set is obtained by subtracting its complement from the total.
Exam Tip
(|U|=18) और (|A'|=7), इसलिए (|A|=18-7=11)। पूरक की संख्या कुल से घटाकर मिलती है।
Login to save your score, XP, coins and progress.
