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

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

Explanation opens after your attempt
Correct Answer

A. (120)

Step 1

Concept

The last digit is fixed as (5), and the other three places are filled in \(6\cdot5\cdot4\) ways. The total is (120).

Step 2

Why this answer is correct

The correct answer is A. (120). The last digit is fixed as (5), and the other three places are filled in \(6\cdot5\cdot4\) ways. The total is (120).

Step 3

Exam Tip

अंतिम अंक निश्चित (5) है और बाकी तीन स्थान \(6\cdot5\cdot4\) तरीकों से भरेंगे। कुल (120) है।

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Mathematics Answer, Explanation and Revision Hints

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

Correct Answer: A. (120). Explanation: अंतिम अंक निश्चित (5) है और बाकी तीन स्थान \(6\cdot5\cdot4\) तरीकों से भरेंगे। कुल (120) है। / The last digit is fixed as (5), and the other three places are filled in \(6\cdot5\cdot4\) ways. The total is (120).

Which concept should I revise for this Mathematics MCQ?

The last digit is fixed as (5), and the other three places are filled in \(6\cdot5\cdot4\) ways. The total is (120).

What exam hint can help solve this Mathematics question?

अंतिम अंक निश्चित (5) है और बाकी तीन स्थान \(6\cdot5\cdot4\) तरीकों से भरेंगे। कुल (120) है।