Posted by **Helen** on Saturday, October 30, 2010 at 7:15pm.

At an outpatient mental health clinic, appointment cancellations occur at a mean rate of 1.60 per day on a typical Wednesday. Let X be the number of cancellations on a particular Wednesday.

a) What is the probability that no cancellations will occur on a particular Wednesday? (Round your answer to 4 decimal places.)

b) What is the probability that exactly three cacellation will occur on a particular wednesday? (Round your answer to 4 decimal places.)

c) What is the probability that more than five cacellations will occur on a particular wednesday? (Round your answer to 4 decimal places.)

d) What is the probability that five or more cacellations will occur on a particular wednesday? (Round your answer to 4 decimal places.)

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