defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Mathematics Permutations and Combinations Combination Function and its properties
The value of
\(\rm (^7C_0+ {^7}C_1)+\rm (^7C_1+ {^7}C_2)+...+\rm (^7C_6+ {^7}C_7)\) is
1
27 - 1
2
28 - 2
3
28 - 1
4
28