Answer:
option B
28
Step-by-step explanation:
Given in the question,
C(8,2)
Formula to use
nCr = n! / r! * (n - r)!
here n = 8
r = 2
We have to calculate combinations of 8 object taken 2 at a time, then
C(8,2)
8C2
8! / 2! * (8 - 2)!
[tex]\frac{8*7*6*5*4*3*2*1}{2*1(6!)}[/tex]
[tex]\frac{8*7*6*5*4*3*2*1}{2*1(6*5*4*3*2*1)}[/tex]
[tex]\frac{8*7}2[/tex]
56/2
28
So, 8C2 = 28
