अंकों (1,2,3,5,6,7,8) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं (6) से शुरू होंगी?

How many (4)-digit numbers can be formed from (1,2,3,5,6,7,8) without repetition and starting with (6)?

Explanation opens after your attempt
Correct Answer

A. (120)

Step 1

Concept

The first digit is fixed as (6), and the remaining (3) places are filled in \(6\cdot5\cdot4\) ways. The answer is (120).

Step 2

Why this answer is correct

The correct answer is A. (120). The first digit is fixed as (6), and the remaining (3) places are filled in \(6\cdot5\cdot4\) ways. The answer is (120).

Step 3

Exam Tip

पहला अंक (6) निश्चित है और बाकी (3) स्थान \(6\cdot5\cdot4\) तरीकों से भरेंगे। उत्तर (120) है।

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Mathematics Answer, Explanation and Revision Hints

अंकों (1,2,3,5,6,7,8) से बिना पुनरावृत्ति (4) अंकों की कितनी संख्याएं (6) से शुरू होंगी? / How many (4)-digit numbers can be formed from (1,2,3,5,6,7,8) without repetition and starting with (6)?

Correct Answer: A. (120). Explanation: पहला अंक (6) निश्चित है और बाकी (3) स्थान \(6\cdot5\cdot4\) तरीकों से भरेंगे। उत्तर (120) है। / The first digit is fixed as (6), and the remaining (3) places are filled in \(6\cdot5\cdot4\) ways. The answer is (120).

Which concept should I revise for this Mathematics MCQ?

The first digit is fixed as (6), and the remaining (3) places are filled in \(6\cdot5\cdot4\) ways. The answer is (120).

What exam hint can help solve this Mathematics question?

पहला अंक (6) निश्चित है और बाकी (3) स्थान \(6\cdot5\cdot4\) तरीकों से भरेंगे। उत्तर (120) है।