Evaluate C(8, 1). A. 8 B. 7 C. 1

Question

asked Oct 28, 2019 154k views

2 Answers

Dave James Miller · Answer 1 · 2019-11-03T22:21:41+0000

Answer:

A. 8

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:

(factorialn)/(factorialr* factorial(n-r))

C(8,1)=
(factorial8)/(factorial1* factorial(8-1))

=
(factorial8)/(factorial1* factorial7)

=
(8* factorial7)/(factorial7) (since, factorial1=1)

= 8

Hence, correct option is:

A. 8