अंकों (2,3,5,6,7,8) से बिना पुनरावृत्ति (4) अंकों की कितनी सम संख्याएं बनेंगी?
How many (4)-digit even numbers can be formed from (2,3,5,6,7,8) without repetition?
Explanation opens after your attempt
A. (180)
Concept
The units place has (3) choices from (2,6,8), and the rest have \(5\cdot4\cdot3\) ways. The total is (180).
Why this answer is correct
The correct answer is A. (180). The units place has (3) choices from (2,6,8), and the rest have \(5\cdot4\cdot3\) ways. The total is (180).
Exam Tip
इकाई स्थान पर (2,6,8) में से (3) विकल्प हैं और बाकी \(5\cdot4\cdot3\) तरीके हैं। कुल (180) है।
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