संबंध \(^{n}C_r=^{n}C_{n-r}\) का सरल कारण क्या है?
What is the simple reason for \(^{n}C_r=^{n}C_{n-r}\)?
Explanation opens after your attempt
Correct Answer
D. (r) वस्तुएँ चुनना उतना ही है जितना (n-r) वस्तुएँ छोड़नाChoosing (r) objects is same as leaving (n-r) objects
Concept
When (r) are chosen the (n-r) objects are automatically left. In exams remember the connection between choosing and leaving.
Why this answer is correct
The correct answer is D. (r) वस्तुएँ चुनना उतना ही है जितना (n-r) वस्तुएँ छोड़ना / Choosing (r) objects is same as leaving (n-r) objects. When (r) are chosen the (n-r) objects are automatically left. In exams remember the connection between choosing and leaving.
Exam Tip
जब (r) चुने जाते हैं तब (n-r) वस्तुएँ अपने आप छूटती हैं। परीक्षा में चयन और त्याग का संबंध याद रखें।
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