College Algebra & Trigonometry, 2018a

7.6. PROBABILITY 341
38) A company has has 50 sales representatives on staff. There are three sales
calls that must be made on the east side of town and five sales calls on the west
side. If the sales reps are chosen at random for these eight sales calls:
a) What is the probability that an individual sales rep will be chosen for
any of the eight sales calls?
b) What is the probability that two sales reps will be selected to make
their sales calls on the same side of town.
39) A student studying for a test knows how to do 12 of the 20 problems from
the study guide. If the test contains 10 problems chosen at random from the
study guide, what is the probability that at least 8 of the problems on the test are
problems the student knows how to do?