अंकों (1,3,5,7,9) से बिना पुनरावृत्ति (3) अंकों की कितनी संख्याएं बनेंगी?
How many (3)-digit numbers can be formed from (1,3,5,7,9) without repetition?
Explanation opens after your attempt
A. (60)
Concept
There are (5,4,3) choices for the three positions. The total is \(5\cdot4\cdot3=60\).
Why this answer is correct
The correct answer is A. (60). There are (5,4,3) choices for the three positions. The total is \(5\cdot4\cdot3=60\).
Exam Tip
तीन स्थानों पर क्रम से (5,4,3) विकल्प हैं। कुल \(5\cdot4\cdot3=60\) है।
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