STATS
posted by Helen .
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.)

You will probably not get any help if you don't show what you've done to solve these problems.
What don't you understand about them?