अंकों (0,1,2,5,7,8) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं बनेंगी?

How many (4)-digit numbers can be formed from (0,1,2,5,7,8) without repetition?

Explanation opens after your attempt
Correct Answer

A. (300)

Step 1

Concept

The thousands place cannot be (0), so \(5\cdot5\cdot4\cdot3=300\). In exams, first choose the non-zero leading digit.

Step 2

Why this answer is correct

The correct answer is A. (300). The thousands place cannot be (0), so \(5\cdot5\cdot4\cdot3=300\). In exams, first choose the non-zero leading digit.

Step 3

Exam Tip

हजार के स्थान पर (0) नहीं आएगा, इसलिए \(5\cdot5\cdot4\cdot3=300\)। परीक्षा में पहले non-zero leading digit चुनें।

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Mathematics Answer, Explanation and Revision Hints

अंकों (0,1,2,5,7,8) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं बनेंगी? / How many (4)-digit numbers can be formed from (0,1,2,5,7,8) without repetition?

Correct Answer: A. (300). Explanation: हजार के स्थान पर (0) नहीं आएगा, इसलिए \(5\cdot5\cdot4\cdot3=300\)। परीक्षा में पहले non-zero leading digit चुनें। / The thousands place cannot be (0), so \(5\cdot5\cdot4\cdot3=300\). In exams, first choose the non-zero leading digit.

Which concept should I revise for this Mathematics MCQ?

The thousands place cannot be (0), so \(5\cdot5\cdot4\cdot3=300\). In exams, first choose the non-zero leading digit.

What exam hint can help solve this Mathematics question?

हजार के स्थान पर (0) नहीं आएगा, इसलिए \(5\cdot5\cdot4\cdot3=300\)। परीक्षा में पहले non-zero leading digit चुनें।