अंकों (0,1,2,3,4,5,6,7) से बिना पुनरावृत्ति (5) अंकों की कितनी संख्याएं बनेंगी जो (5) से विभाज्य हों?

How many (5)-digit numbers divisible by (5) can be formed from (0,1,2,3,4,5,6,7) without repetition?

Explanation opens after your attempt
Correct Answer

B. (1260)

Step 1

Concept

The last digit is (0) or (5), and both cases must be counted separately. The total is \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\).

Step 2

Why this answer is correct

The correct answer is B. (1260). The last digit is (0) or (5), and both cases must be counted separately. The total is \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\).

Step 3

Exam Tip

अंतिम अंक (0) या (5) होगा और दोनों cases अलग-अलग गिनने होंगे। कुल \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\) है।

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Mathematics Answer, Explanation and Revision Hints

अंकों (0,1,2,3,4,5,6,7) से बिना पुनरावृत्ति (5) अंकों की कितनी संख्याएं बनेंगी जो (5) से विभाज्य हों? / How many (5)-digit numbers divisible by (5) can be formed from (0,1,2,3,4,5,6,7) without repetition?

Correct Answer: B. (1260). Explanation: अंतिम अंक (0) या (5) होगा और दोनों cases अलग-अलग गिनने होंगे। कुल \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\) है। / The last digit is (0) or (5), and both cases must be counted separately. The total is \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\).

Which concept should I revise for this Mathematics MCQ?

The last digit is (0) or (5), and both cases must be counted separately. The total is \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\).

What exam hint can help solve this Mathematics question?

अंतिम अंक (0) या (5) होगा और दोनों cases अलग-अलग गिनने होंगे। कुल \(^{7}P_4+6\cdot{}^{6}P_3=840+420=1260\) है।