[tex]\begin{gathered} \text{ since we went to the bank }4\text{ times, we will use the expression} \\ \\ \text{average}=\frac{total\text{ money}}{times\text{ we went to the bank}} \\ \\ \text{average}=\frac{160}{4} \\ \\ \text{average}=40 \\ \\ \text{the avegare amount we withdrew each time is \$40} \end{gathered}[/tex]
