\(\frac{^{n}C_r}{^{n}C_{r-1}}\) का सही मान कौन-सा है?
What is the correct value of \(\frac{^{n}C_r}{^{n}C_{r-1}}\)?
Explanation opens after your attempt
B. \(\frac{n-r+1}{r}\)
Concept
Dividing the factorial forms leaves \(\frac{n-r+1}{r}\). In exams use the ratio formula for adjacent terms.
Why this answer is correct
The correct answer is B. \(\frac{n-r+1}{r}\). Dividing the factorial forms leaves \(\frac{n-r+1}{r}\). In exams use the ratio formula for adjacent terms.
Exam Tip
Factorial रूपों को भाग देने पर \(\frac{n-r+1}{r}\) बचता है। परीक्षा में adjacent terms के लिए ratio formula उपयोग करें।
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