यदि \(U={1,2,\ldots,27}\), \(A={x:x \in U,3\mid x}\), तो (A') में (2) से विभाज्य सदस्यों की संख्या कितनी है?
If \(U={1,2,\ldots,27}\), \(A={x:x \in U,3\mid x}\), how many elements divisible by (2) are in (A')?
Explanation opens after your attempt
A. (9)
Concept
There are (13) even numbers up to (27). Among them (6,12,18,24) are also divisible by (3), so (13-4=9) remain.
Why this answer is correct
The correct answer is A. (9). There are (13) even numbers up to (27). Among them (6,12,18,24) are also divisible by (3), so (13-4=9) remain.
Exam Tip
(27) तक सम संख्याएं (13) हैं। इनमें (6,12,18,24) (3) से भी विभाज्य हैं, इसलिए (13-4=9) बचते हैं।
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