अंकों (0,1,2,3,4,5,6,7) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं बनेंगी?

How many (4)-digit numbers can be formed from (0,1,2,3,4,5,6,7) without repetition?

Explanation opens after your attempt
Correct Answer

A. (1470)

Step 1

Concept

The first digit cannot be (0), so \(7\cdot7\cdot6\cdot5=1470\). In exams, apply the leading-zero condition first.

Step 2

Why this answer is correct

The correct answer is A. (1470). The first digit cannot be (0), so \(7\cdot7\cdot6\cdot5=1470\). In exams, apply the leading-zero condition first.

Step 3

Exam Tip

पहला अंक (0) नहीं हो सकता, इसलिए \(7\cdot7\cdot6\cdot5=1470\)। परीक्षा में leading zero की शर्त पहले लगाएं।

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Mathematics Answer, Explanation and Revision Hints

अंकों (0,1,2,3,4,5,6,7) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं बनेंगी? / How many (4)-digit numbers can be formed from (0,1,2,3,4,5,6,7) without repetition?

Correct Answer: A. (1470). Explanation: पहला अंक (0) नहीं हो सकता, इसलिए \(7\cdot7\cdot6\cdot5=1470\)। परीक्षा में leading zero की शर्त पहले लगाएं। / The first digit cannot be (0), so \(7\cdot7\cdot6\cdot5=1470\). In exams, apply the leading-zero condition first.

Which concept should I revise for this Mathematics MCQ?

The first digit cannot be (0), so \(7\cdot7\cdot6\cdot5=1470\). In exams, apply the leading-zero condition first.

What exam hint can help solve this Mathematics question?

पहला अंक (0) नहीं हो सकता, इसलिए \(7\cdot7\cdot6\cdot5=1470\)। परीक्षा में leading zero की शर्त पहले लगाएं।