Question 206819
Let W = wait time, C = number of customers ahead of the patron, and T = the number of tellers.
The wait-time in minutes can be expressed by the equation:
{{{W = 2.75C/T}}} Substitute C = 20 and T = 5.
{{{W = 2.75(20)/5}}} Evaluate.
{{{highlight(W = 11)}}}minutes.