Class 11 Mathematics Permutations and Combinations Derivations of formulas and their connections Hard Level 64

यदि (8) people को एक row में arrange करना है लेकिन (2) विशेष people साथ रहें, तो block method किस formula connection पर आधारित है?

If (8) people are arranged in a row but (2) special people must stay together, the block method is based on which formula connection?

Explanation opens after your attempt
Correct Answer

A. Block को एक object मानकर \(7!\cdot2!\)Treat the block as one object and use \(7!\cdot2!\)

Step 1

Concept

Treating two together people as one block gives (7) objects to arrange and (2!) ways inside the block. In exams use block method for together conditions.

Step 2

Why this answer is correct

The correct answer is A. Block को एक object मानकर \(7!\cdot2!\) / Treat the block as one object and use \(7!\cdot2!\). Treating two together people as one block gives (7) objects to arrange and (2!) ways inside the block. In exams use block method for together conditions.

Step 3

Exam Tip

दो साथ लोगों को एक block मानने से (7) objects arrange होते हैं और block के अंदर (2!) ways हैं। परीक्षा में together condition में block method लगाएं।

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यदि (8) people को एक row में arrange करना है लेकिन (2) विशेष people साथ रहें, तो block method किस formula connection पर आधारित है? / If (8) people are arranged in a row but (2) special people must stay together, the block method is based on which formula connection?

Correct Answer: A. Block को एक object मानकर \(7!\cdot2!\) / Treat the block as one object and use \(7!\cdot2!\). Explanation: दो साथ लोगों को एक block मानने से (7) objects arrange होते हैं और block के अंदर (2!) ways हैं। परीक्षा में together condition में block method लगाएं। / Treating two together people as one block gives (7) objects to arrange and (2!) ways inside the block. In exams use block method for together conditions.

Which concept should I revise for this Mathematics MCQ?

Treating two together people as one block gives (7) objects to arrange and (2!) ways inside the block. In exams use block method for together conditions.

What exam hint can help solve this Mathematics question?

दो साथ लोगों को एक block मानने से (7) objects arrange होते हैं और block के अंदर (2!) ways हैं। परीक्षा में together condition में block method लगाएं।