Supermarket 20053

When only three checkouts are open in a supermarket, people wait in line for an average of 10 minutes. How many minutes will the average waiting time in line be if two more checkouts open?

Correct answer:

d =  6 min

Step-by-step explanation:

3:(3+2) = d:10  d (3+2) = 3 10  d=10 3+23=6 min



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