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4. Question 4 (6 marks) Based on the past experience, it is estimated that five percent...

4. Question 4 Based on the past experience, it is estimated that five percent of the customers of a mortgage company default on their payments. A sample of 20 customers is selected. a. What is the probability that exactly one customer in the sample will default on their payments? [2 marks] b. What is the probability that at least one customer in the sample will default on their payments? [2 marks] c. What is the probability that at most three (i.e., less than or equal to 3) customers in the sample will default on their payments?

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