अंकों (1,2,3,4,5,6) से बिना पुनरावृत्ति (4) अंकों की कितनी विषम संख्याएं बनेंगी?
How many (4)-digit odd numbers can be formed from (1,2,3,4,5,6) without repetition?
Explanation opens after your attempt
A. (180)
Concept
There are (3) odd choices for the units place and the remaining places are filled in \(5\cdot4\cdot3\) ways. The total is (180).
Why this answer is correct
The correct answer is A. (180). There are (3) odd choices for the units place and the remaining places are filled in \(5\cdot4\cdot3\) ways. The total is (180).
Exam Tip
इकाई स्थान पर (3) विषम अंक हैं और शेष स्थान \(5\cdot4\cdot3\) तरीकों से भरते हैं। कुल (180) संख्याएं मिलती हैं।
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