Question

I need help please and thanks

Answer 1

Answer:

10

Step-by-step explanation:

n is the number of selections and k the number selected, that is

n = 5 and k = 2

note that n! = n(n - 1)(n - 2) ..... × 3 × 2 × 1, thus

$\frac{5(4)(3)(2)(1)}{2!(5-2)!}$

= $\frac{120}{2(1)3(2)(1)}$

= $\frac{120}{2(6)}$

= $\frac{120}{12}$

= 10