defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Permutations and Combinations Fundamental Principles of Counting
\(\frac{{{C_0}}}{1} + \frac{{{C_1}}}{2} + \frac{{{C_{_2}}}}{3} + \_\_\_\_ + \frac{{{C_n}}}{{n + 1}} = \)
1
\(\frac{{{2^n}}}{{n + 1}}\)
2
\(\frac{{{2^n} - 1}}{{n + 1}}\)
3
\(\frac{{{2^{n + 1}-1} }}{{n + 1}}\)
4
None of these