अंकों (4,5,6,7,8,9) से बिना पुनरावृत्ति कितनी (4)-अंकीय संख्याएँ बनेंगी?
How many (4)-digit numbers can be formed from digits (4,5,6,7,8,9) without repetition?
Explanation opens after your attempt
C. (360)
Concept
For four places, there are \(6\times5\times4\times3=360\) ways. Without repetition, choices decrease.
Why this answer is correct
The correct answer is C. (360). For four places, there are \(6\times5\times4\times3=360\) ways. Without repetition, choices decrease.
Exam Tip
चार स्थानों के लिए \(6\times5\times4\times3=360\) तरीके हैं। बिना पुनरावृत्ति में विकल्प घटते हैं।
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