अंकों (1,2,3,4,5) से बिना पुनरावृत्ति (3) अंकों की कितनी संख्याएं बनेंगी?
How many (3)-digit numbers can be formed from (1,2,3,4,5) without repetition?
Explanation opens after your attempt
A. (60)
Concept
There are (5,4,3) choices for the three places, so \(5\cdot4\cdot3=60\). In exams, choices reduce without repetition.
Why this answer is correct
The correct answer is A. (60). There are (5,4,3) choices for the three places, so \(5\cdot4\cdot3=60\). In exams, choices reduce without repetition.
Exam Tip
तीन स्थानों के लिए (5,4,3) विकल्प हैं, इसलिए \(5\cdot4\cdot3=60\)। परीक्षा में बिना पुनरावृत्ति में विकल्प घटते हैं।
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