(Answered) Question a research study performed at checkout lines at

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Question: A research study performed at checkout lines at Publix Supermarket in South Florida revealed that between 4pm and 7pm on weekdays there is an average of 4 customers waiting in line. What is the probability that you visit a Publix today during this period and find:

No customers waiting?
4 customers waiting?
4 or fewer customers waiting?
4 or more customers waiting?

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