CHAPTER 4—INTRODUCTION TO PROBABILITYMULTIPLE CHOICE1.The counting rule that is used for counting the number of experimental outcomes when n objects are selected from a set of N objects where order of selectionis notimportant is calleda.permutationb.combinationc.multiple step experimentd.None of these alternatives is correct.ANS: B 2.The counting rule that is used for counting the number of experimental outcomes when n objects are selected from a set of N objects where order of selectionis important is called a.permutationb.combinationc.multiple step experimentd.None of these alternatives is correct.ANS: A 3.From a group of six people, two individuals are to be selected at random. How many possible selections are there? 4.If a six sided die is tossed two times and "3" shows up both times, the probability of "3" on the third trial is 5.If A and B are independent events with P(A) = 0.65 and P(A B) = 0.26, then, P(B) = 6.If P(A) = 0.4, P(B | A) = 0.35, P(A B) = 0.69, then P(B) = a.0.14b.0.43c. 0.75 d. 0.59
ANS: B 7.Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are there? 8.Given that event E has a probability of 0.31, the probability of the complement of event E 9.Each individual outcome of an experiment is called 10.The collection of all possible sample points in an experiment is a.the sample spaceb.a sample pointc.an experimentd.the populationANS: A 11.A graphical method of representing the sample points of an experiment is 12.An experiment consists of selecting a student body president and vice president. All undergraduate students (freshmen through seniors) are eligible for these offices. How many sample points (possible outcomes as to the classifications) exist? 13. Three applications for admission to a local university are checked, and it is determined whether each applicant is male or female. The number of sample points in this experiment is
14.Assume your favorite football team has 2 games left to finish the season. The outcome of each game can be win, lose or tie. The number of possible outcomes is a.2b.4c.6d.9ANS: D 15.Each customer entering a department store will either buy or not buy some merchandise. An experiment consists of following 3 customers and determining whether or not they purchase any merchandise. The number of sample points in this experiment is 16.An experiment consists of tossing 4 coins successively. The number of sample points in this experiment is 17.Any process that generates well-defined outcomes is
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