Suppose a random variable, x, follows a Poisson distribution. Let = 3 every day, find the P(X 12) over a week. Round answer to 4 decimal places. Answer:

A bank gets an average of 12 customers per hour. Assume the variable follows a Poisson distribution. Find the probability that there will be 4 or more customers at this bank in one hour. (That is, find P(X4)) (round to 4 decimal places) Answer:

On a baseball team, there are infielders and outfielders. Some players are great hitters, and some players are not great hitters. Let I = the event that a player in an infielder. Let O = the event that a player is an outfielder. Let H = the event that a player is a great hitter. Let N = the event that a player is not a great hitter. Write the symbols for the probability that a player is an outfielder or is a great hitter.

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