nCr =কত ?
A \(\frac{{n!}}{{\left( {n - r} \right)!r!}}\)
B \(\frac{r}{{\left( {n - 1} \right)!}}\)
C \((r - 1)!{ \times ^n}{C_r}\)
D \(\frac{{n!}}{{\left( {n - r} \right)!}}\)
Correct Answer: Option A
Download our app for free and access thousands of MCQ questions with detailed solutions