At a Course in Public Speaking, the Instructor Always Gives

question 32

Multiple Choice

At a course in public speaking, the instructor always gives an opening speech that lasts betweenfifteen and eighteen minutes. The length of the speech can be modeled by a uniform distribution,that is, the speech is just as likely to last fifteen minutes as it is to last eighteen minutes. Theprobability density curve is shown below. What is the probability that the speech will last sixteenminutes or more? What is the probability that the speech will last between eighteen and nineteenminutes?

• A) Can't be determined with the given information
• B) 0.50; 0.25
• C) 0.50; 0.75
• D) 0.75; 0.25

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