Business at the Kwik-E-Mart Is Brisk, with One Customer Arriving

Multiple Choice

Business at the Kwik-E-Mart is brisk, with one customer arriving at a rate of six per hour on average. Ringing up purchases is an easy matter for owner/operator Apu; he can usually do so in 2 minutes. If both arrival and service rates are Poisson distributed, how many customers are in the store on average?

A) 0.05
B) 0.16
C) 0.25
D) 0.50