Question: A grocery store has three open checkout lanes. On average, 45 shoppers arrive at these lanes per hour. The coefficient of variation of the interarrival

  1. A grocery store has three open checkout lanes. On average, 45 shoppers arrive at these lanes per hour. The coefficient of variation of the interarrival time is equal to 1. The average service time for each lane is 18 customers per hour, and the coefficient of variation of service time distribution for each lane is three minutes. If one more checkout lane is added, what is the new utilization of the system?

a.0.833

b.0.50

c.0.25

d.0.625

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