Table 12-6 Customers Arrive at Coffee Shop at a Rate of 40

Multiple Choice

Table 12-6
Customers arrive at coffee shop at a rate of 40 per hour.There are 2 servers available and it takes an average of 1 minute to serve each customer.
-Using Table 12-6,what proportion of time are the servers busy?

A) 0
B) 0.333
C) 0.5
D) 0.6667
E) 1