(9) अलग-अलग वस्तुओं को पंक्ति में व्यवस्थित करना है। तीन विशेष वस्तुएं आपस में साथ रहें लेकिन उनका आंतरिक क्रम निश्चित हो। कितनी व्यवस्थाएं होंगी?

(9) distinct objects are to be arranged in a row. Three particular objects must stay together but their internal order is fixed. How many arrangements are possible?

Explanation opens after your attempt
Correct Answer

A. (5040)

Step 1

Concept

Treat the three objects as a fixed-order block, giving (7) units. Hence there are (7!=5040) arrangements.

Step 2

Why this answer is correct

The correct answer is A. (5040). Treat the three objects as a fixed-order block, giving (7) units. Hence there are (7!=5040) arrangements.

Step 3

Exam Tip

तीन वस्तुओं को fixed-order ब्लॉक मानें, तब (7) इकाइयां बनती हैं। इसलिए (7!=5040) व्यवस्थाएं होंगी।

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Mathematics Answer, Explanation and Revision Hints

(9) अलग-अलग वस्तुओं को पंक्ति में व्यवस्थित करना है। तीन विशेष वस्तुएं आपस में साथ रहें लेकिन उनका आंतरिक क्रम निश्चित हो। कितनी व्यवस्थाएं होंगी? / (9) distinct objects are to be arranged in a row. Three particular objects must stay together but their internal order is fixed. How many arrangements are possible?

Correct Answer: A. (5040). Explanation: तीन वस्तुओं को fixed-order ब्लॉक मानें, तब (7) इकाइयां बनती हैं। इसलिए (7!=5040) व्यवस्थाएं होंगी। / Treat the three objects as a fixed-order block, giving (7) units. Hence there are (7!=5040) arrangements.

Which concept should I revise for this Mathematics MCQ?

Treat the three objects as a fixed-order block, giving (7) units. Hence there are (7!=5040) arrangements.

What exam hint can help solve this Mathematics question?

तीन वस्तुओं को fixed-order ब्लॉक मानें, तब (7) इकाइयां बनती हैं। इसलिए (7!=5040) व्यवस्थाएं होंगी।