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

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

Explanation opens after your attempt
Correct Answer

D. (3360)

Step 1

Concept

There are (4) even choices for the last place and the remaining (4) places are filled in \(^{7}P_4\) ways. The total is \(4\cdot840=3360\).

Step 2

Why this answer is correct

The correct answer is D. (3360). There are (4) even choices for the last place and the remaining (4) places are filled in \(^{7}P_4\) ways. The total is \(4\cdot840=3360\).

Step 3

Exam Tip

अंतिम स्थान पर (4) सम विकल्प हैं और बाकी (4) स्थान \(^{7}P_4\) तरीकों से भरेंगे। कुल \(4\cdot840=3360\) है।

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Mathematics Answer, Explanation and Revision Hints

अंकों (1,2,3,4,5,6,7,8) से बिना पुनरावृत्ति (5) अंकों की कितनी सम संख्याएं बनेंगी? / How many (5)-digit even numbers can be formed from (1,2,3,4,5,6,7,8) without repetition?

Correct Answer: D. (3360). Explanation: अंतिम स्थान पर (4) सम विकल्प हैं और बाकी (4) स्थान \(^{7}P_4\) तरीकों से भरेंगे। कुल \(4\cdot840=3360\) है। / There are (4) even choices for the last place and the remaining (4) places are filled in \(^{7}P_4\) ways. The total is \(4\cdot840=3360\).

Which concept should I revise for this Mathematics MCQ?

There are (4) even choices for the last place and the remaining (4) places are filled in \(^{7}P_4\) ways. The total is \(4\cdot840=3360\).

What exam hint can help solve this Mathematics question?

अंतिम स्थान पर (4) सम विकल्प हैं और बाकी (4) स्थान \(^{7}P_4\) तरीकों से भरेंगे। कुल \(4\cdot840=3360\) है।