1. A travel agency found that 80% of the customers will be satisfied with theservices thattheyprovide. Assume that thetravel agencyhas taken a random sample of 25 of its most recent customers, what is the probability that less than 21 of the 25 customers were satisfied with theservicesthey provided?
2. A regional company is inviting a delegation of three (3) employees to a marketing convention overseas. It is indicated that only one (1) person may go from each of the three departments: sales, marketing, and purchasing. There are five (5) sales, three (3) marketing, and four (4) purchasing employees who are eligible to attend the marketing convention. How many different delegations could the company invite to the convention?
3. The defects in the rubber covering on a particular type of telephone cable follow a Poisson distribution with a mean rate of 0.00065 per lineal metre. What is the probability of fewer than 2 defects in a spool of 10,000 lineal metres?