Question

The general manager of a fast-food restaurant chain must select 9 restaurants from 10 for a promotional program. How manydifferent possible ways can this selection be done?It is possible to select the nine restaurants indifferent ways.Х5EHELP

Answer 1

To select 9 items from 10, this is can be written as

`^(10)C_9`

This becomes

`\begin{gathered} ^(10)C_9=(10!)/((10-9)!*9!) \\ =(10*9!)/(1*9!) \\ =(10)/(1) \\ =10\text{ ways } \end{gathered}`

Hence, the answer is 10 ways