Question: Aldi has three open checkout lanes. There is a single queue for each of these lanes. On average, 45 shoppers arrives at these lanes per

Aldi has three open checkout lanes. There is a single queue for each of these lanes. On average, 45 shoppers arrives at these lanes per hour. The coefficient of variation of the inter-arrival time is equal to 1. The average services times for all the lanes is 18 customers per hour, and the coefficient of variation of service time distribution for all 3 lanes is 3.

1) On average, how many customers are waiting in queue?

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