Answer:
A. 8
Step-by-step explanation:
C(8,1) means number of ways of choosing 1 element out of 8
That is it is a combination.
We know that the formula for C(n,r) is:
[tex]\dfrac{factorialn}{factorialr\times factorial(n-r)}[/tex]
C(8,1)= [tex]\dfrac{factorial8}{factorial1\times factorial(8-1)}[/tex]
= [tex]\dfrac{factorial8}{factorial1\times factorial7}[/tex]
= [tex]\dfrac{8\times factorial7}{factorial7}[/tex] (since, factorial1=1)
= 8
Hence, correct option is:
A. 8
