A person going to a party was asked to bring 2 different bags of chips. Going to the store, she finds 9varieties.How many different selections can she make?

Question

asked Dec 8, 2023 180k views

1 Answer

Fgrieu · Answer 1 · 2023-12-13T12:42:13+0000

Answer:

She can make 36 different selections

Step-by-step explanation:

Total number of selection = 2

Sample = 9

$\begin{gathered} 9C2=(9!)/((9-2)!2!) \\ \\ =(9!)/(7!2!) \\ \\ =(9*8*7!)/(7!*2*1) \\ \\ =(9*8)/(2*1) \\ \\ =9*4=36 \end{gathered}$

She can make 36 different selections