Question

Suppose we want to choose 5 objects, without replacement, from 18 distinct objects.

Answer 1

Answer:

(a) 1,028,160

(b) 8,568

Step-by-step explanation:

(a)

$18 \times 17 \times 16 \times 15 \times 14 = 1028160$

(b) 18! / (5! 13!) =

$\frac{18 \times 17 \times 16 \times 15 \times 14}{5 \times 4 \times 3 \times 2 \times 1} = 8568$