defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Permutations and Combinations Factorial and its Properties
What is \(\rm \displaystyle\sum^1_{r=0} {^{n+r}}C_n\) equal to?
1
\(\rm ^{n+2}C_ 1 \)
2
\(\rm ^{n+2}C_n\)
3
\(\rm ^{n+3}C_n\)
4
\(\rm ^{n+2}C_{n-1}\)