Evaluate. 7C6

A. 9

B. 1

C. 5,040

D. 7

can someone explain this to me?

This question involves mathematical combinations. The formula is:

nCr = n!/r! (n - r) !

Substituting the values:

7C6 = 7!/6! (7 - 6) !

= (7 x 6 x 5 x 4 x 3 x 2 x 1) / (6 x 5 x 4 x 3 x 2 x 1) (1)

= 7

The answer is D

Main formula nCp = n! / p! (n-p) !

so 7C6 = 7! / 6! (1!) = 5,040/720=7

the answer is D. 7