Answer:
70
Step-by-step explanation:
It is made with a combination. Combination of 4 taken from 8, the formula of the combination is as follows:
nCr = n! / (r! * (n-r)!)
In this case 8 is "n" and 4 is "r"
8C4 = 8! / (4! * (8-4))!
8C4 = 8! / (4! * 4!)
8C4 = 40320/576
8C4 = 70
In this way he obtained the answer that is 70
