Question

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?

Answer 1

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