Homework Help: statistics

Posted by kim on Saturday, March 26, 2011 at 11:48pm.

A study of checkout lines at the Safeway revealed that between 4-7pm on weekdays there is an average of 4 customers waiting in line. What is the probability that you visit that Safeway during this time period and...
1-no customers are waiting in line?
2-Four customers are waiting?
3-Four or fewer customers are waiting?
4-Four or more customers are waiting?

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