यदि \(^{15}C_2\) से handshake गिने जा रहे हैं तो (2) से भाग का विचार क्या है?

If handshakes are counted by \(^{15}C_2\) what is the idea behind division by (2)?

Explanation opens after your attempt
Correct Answer

A. व्यक्ति (A) से (B) और (B) से (A) एक ही handshake हैPerson (A) to (B) and (B) to (A) is the same handshake

Step 1

Concept

A handshake is an unordered pair so (AB) and (BA) are not counted separately. In exams use combination when a pair has no direction.

Step 2

Why this answer is correct

The correct answer is A. व्यक्ति (A) से (B) और (B) से (A) एक ही handshake है / Person (A) to (B) and (B) to (A) is the same handshake. A handshake is an unordered pair so (AB) and (BA) are not counted separately. In exams use combination when a pair has no direction.

Step 3

Exam Tip

Handshake unordered pair है इसलिए (AB) और (BA) अलग नहीं गिने जाते। परीक्षा में pair की दिशा न हो तो combination लगाएँ।

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Mathematics Answer, Explanation and Revision Hints

यदि \(^{15}C_2\) से handshake गिने जा रहे हैं तो (2) से भाग का विचार क्या है? / If handshakes are counted by \(^{15}C_2\) what is the idea behind division by (2)?

Correct Answer: A. व्यक्ति (A) से (B) और (B) से (A) एक ही handshake है / Person (A) to (B) and (B) to (A) is the same handshake. Explanation: Handshake unordered pair है इसलिए (AB) और (BA) अलग नहीं गिने जाते। परीक्षा में pair की दिशा न हो तो combination लगाएँ। / A handshake is an unordered pair so (AB) and (BA) are not counted separately. In exams use combination when a pair has no direction.

Which concept should I revise for this Mathematics MCQ?

A handshake is an unordered pair so (AB) and (BA) are not counted separately. In exams use combination when a pair has no direction.

What exam hint can help solve this Mathematics question?

Handshake unordered pair है इसलिए (AB) और (BA) अलग नहीं गिने जाते। परीक्षा में pair की दिशा न हो तो combination लगाएँ।