\(^{n}C_r\) के ratio \(\frac{^{n}C_{r+1}}{^{n}C_r}\) का सही मान कौन-सा है?
What is the correct value of the ratio \(\frac{^{n}C_{r+1}}{^{n}C_r}\)?
Explanation opens after your attempt
Correct Answer
B. \(\frac{n-r}{r+1}\)
Concept
Dividing the factorial formulas gives \(\frac{n-r}{r+1}\). In exams ratios make adjacent combinations faster.
Why this answer is correct
The correct answer is B. \(\frac{n-r}{r+1}\). Dividing the factorial formulas gives \(\frac{n-r}{r+1}\). In exams ratios make adjacent combinations faster.
Exam Tip
Factorial formula को divide करने पर \(\frac{n-r}{r+1}\) मिलता है। परीक्षा में adjacent combinations के लिए ratio से तेजी आती है।
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