(5) अलग-अलग मोबाइल और (4) अलग-अलग लैपटॉप को पंक्ति में ऐसे रखा जाए कि सभी मोबाइल साथ रहें। कितनी व्यवस्थाएं होंगी?

In how many ways can (5) distinct mobiles and (4) distinct laptops be arranged in a row so that all mobiles stay together?

Explanation opens after your attempt
Correct Answer

A. (17280)

Step 1

Concept

Treat the five mobiles as one block, then there are (5) units. The arrangement is \(5!\cdot5!=14400\).

Step 2

Why this answer is correct

The correct answer is A. (17280). Treat the five mobiles as one block, then there are (5) units. The arrangement is \(5!\cdot5!=14400\).

Step 3

Exam Tip

पांच मोबाइल को एक ब्लॉक मानें, तब (5) इकाइयां हैं। व्यवस्था \(5!\cdot5!=14400\) होगी।

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Mathematics Answer, Explanation and Revision Hints

(5) अलग-अलग मोबाइल और (4) अलग-अलग लैपटॉप को पंक्ति में ऐसे रखा जाए कि सभी मोबाइल साथ रहें। कितनी व्यवस्थाएं होंगी? / In how many ways can (5) distinct mobiles and (4) distinct laptops be arranged in a row so that all mobiles stay together?

Correct Answer: A. (17280). Explanation: पांच मोबाइल को एक ब्लॉक मानें, तब (5) इकाइयां हैं। व्यवस्था \(5!\cdot5!=14400\) होगी। / Treat the five mobiles as one block, then there are (5) units. The arrangement is \(5!\cdot5!=14400\).

Which concept should I revise for this Mathematics MCQ?

Treat the five mobiles as one block, then there are (5) units. The arrangement is \(5!\cdot5!=14400\).

What exam hint can help solve this Mathematics question?

पांच मोबाइल को एक ब्लॉक मानें, तब (5) इकाइयां हैं। व्यवस्था \(5!\cdot5!=14400\) होगी।