$1)$ Ten customers visit C&A Bakery from $8$ a$.$m$.$ to $10$ a$.$m$.$ The customers spend $10,15,20,11,8,12,25,18,29,$ and $32$ minutes in the bakery. On average, how many customers are in the bakery?

A$)18$

B$)10$

C$)1\mathrm{.}5$

D$)0\mathrm{.}83$