Question

Evaluate: 5C2

20
25
10
60

Answer 1

5C2 is:
\[\left(\begin{matrix}5 \\ 2\end{matrix}\right) = \frac{5!}{2!(5-2)!} = \frac{5!}{2!3!}\]

Answer 2

10

Answer 3

my thought process is as this:\[\]
do 5P2; 5*4 = 20\[\]
and divide that by 2!, which = 2\[\]
20/2