अंकों (1,4,7,8,9) से बिना पुनरावृत्ति कितनी (3)-अंकीय संख्याएँ बनेंगी?

How many (3)-digit numbers can be formed from digits (1,4,7,8,9) without repetition?

Explanation opens after your attempt
Correct Answer

D. (60)

Step 1

Concept

For three places, there are \(5\times4\times3=60\) ways. Without repetition, each next choice decreases.

Step 2

Why this answer is correct

The correct answer is D. (60). For three places, there are \(5\times4\times3=60\) ways. Without repetition, each next choice decreases.

Step 3

Exam Tip

तीन स्थानों के लिए \(5\times4\times3=60\) तरीके हैं। बिना पुनरावृत्ति में हर अगला विकल्प कम होता है।

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Mathematics Answer, Explanation and Revision Hints

अंकों (1,4,7,8,9) से बिना पुनरावृत्ति कितनी (3)-अंकीय संख्याएँ बनेंगी? / How many (3)-digit numbers can be formed from digits (1,4,7,8,9) without repetition?

Correct Answer: D. (60). Explanation: तीन स्थानों के लिए \(5\times4\times3=60\) तरीके हैं। बिना पुनरावृत्ति में हर अगला विकल्प कम होता है। / For three places, there are \(5\times4\times3=60\) ways. Without repetition, each next choice decreases.

Which concept should I revise for this Mathematics MCQ?

For three places, there are \(5\times4\times3=60\) ways. Without repetition, each next choice decreases.

What exam hint can help solve this Mathematics question?

तीन स्थानों के लिए \(5\times4\times3=60\) तरीके हैं। बिना पुनरावृत्ति में हर अगला विकल्प कम होता है।