The sum 1 ^ 20 C_1-2 ^ 20 C_2+3 ^ 20 C_3- -20 ^ 20 C_ 20 is equal to

JEE Advanced Mathematics question

The sum is equal to

Answer: (B)

Using :

(- {}^{20}=20

Create a free account to read the complete working (2 steps), and practise questions like this in a timed test.

Question ID VK-108353