1.Unknown to a medical researcher,8out of19patients have a heart problem that will result in death if they receive the test drug.5patients are randomly selected to receive the drug and the rest receive a placebo. What is the probability that exactly3patients will die? Express your answer as a fraction or a decimal number rounded to four decimal places.

2.The number of calls received by an office on Monday morning between8:00 AMand9:00 AMhas a mean of6. Calculate the probability of getting no more than1 call between eight and nine in the morning. Round your answer to four decimal places.

3A. Consider the following data:

x | 4 | 5 | 6| 7| 8

P(X<8) | .2 | .2| .2| .2 | .2

Find the value ofP(X<8) Round your answer to one decimal place.

3B. Find the value ofP(X8) Round your answer to one decimal place.

4. A town recently dismissed5employees in order to meet their new budget reductions. The town had5employees over50years of age and18under50. If the dismissed employees were selected at random, what is the probability that exactly1employee was over50? Express your answer as a fraction or a decimal number rounded to four decimal places.

5. The Magazine Mass Marketing Company has received18entries in its latest sweepstakes. They know that the probability of receiving a magazine subscription order with an entry form is0.4. What is the probability that no more than a third of the entry forms will include an order? Round your answer to four decimal places.