अंकों (1,2,3,4,5,6,7,8) से बिना पुनरावृत्ति कितनी (4)-अंकीय संख्याएं (4000) से बड़ी बनेंगी?

How many (4)-digit numbers greater than (4000) can be formed from (1,2,3,4,5,6,7,8) without repetition?

Explanation opens after your attempt
Correct Answer

A. (840)

Step 1

Concept

The thousands digit can be (4,5,6,7,8), and the remaining (3) places are filled in \(^{7}P_{3}\) ways. In comparison questions, fix the first digit first.

Step 2

Why this answer is correct

The correct answer is A. (840). The thousands digit can be (4,5,6,7,8), and the remaining (3) places are filled in \(^{7}P_{3}\) ways. In comparison questions, fix the first digit first.

Step 3

Exam Tip

हजार का अंक (4,5,6,7,8) में से होगा और बाकी (3) स्थान \(^{7}P_{3}\) तरीकों से भरेंगे। तुलना वाले प्रश्नों में पहले पहला अंक तय करें।

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Mathematics Answer, Explanation and Revision Hints

अंकों (1,2,3,4,5,6,7,8) से बिना पुनरावृत्ति कितनी (4)-अंकीय संख्याएं (4000) से बड़ी बनेंगी? / How many (4)-digit numbers greater than (4000) can be formed from (1,2,3,4,5,6,7,8) without repetition?

Correct Answer: A. (840). Explanation: हजार का अंक (4,5,6,7,8) में से होगा और बाकी (3) स्थान \(^{7}P_{3}\) तरीकों से भरेंगे। तुलना वाले प्रश्नों में पहले पहला अंक तय करें। / The thousands digit can be (4,5,6,7,8), and the remaining (3) places are filled in \(^{7}P_{3}\) ways. In comparison questions, fix the first digit first.

Which concept should I revise for this Mathematics MCQ?

The thousands digit can be (4,5,6,7,8), and the remaining (3) places are filled in \(^{7}P_{3}\) ways. In comparison questions, fix the first digit first.

What exam hint can help solve this Mathematics question?

हजार का अंक (4,5,6,7,8) में से होगा और बाकी (3) स्थान \(^{7}P_{3}\) तरीकों से भरेंगे। तुलना वाले प्रश्नों में पहले पहला अंक तय करें।