Test_2_Review_Key

Test_2_Review_Key - AT151 M 1 While staying in a hotel you...

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MAT 151              Extra Problems for Chapters 3-5     1. While staying in a hotel, you decide to rent a DVD from the font desk. They have 6 comedies, 5 action movies, 4 romantic movies, 9 children’s movies, and one classic western movie. Suppose that you want to apply what you are learning in MAT 151 to this movie selection. You decide to consider the selection as an experiment. You write the genre of each movie on a piece of paper, put them in a hat, mix them up and then compute as follows: a. Identify the sample space of this experiment. S = {comedy, action, romantic, children, western} b. Compute the probability of randomly selecting a children’s movie. 9/25 c. Compute the probability of randomly selecting a classic western movie or an action movie. 1/25 + 5/25 = 6/25 d. Are the events in part c mutually exclusive? Yes. e. If the desk clerk allows you to select two DVDs, what is the probability that you will select two action movies? 5/25 * 4/24 f. Are the events in part e independent? No. 2. The chart below shows the number of Endangered and Threatened Species in the US: Endangered Threatened Total Mammals 68 10 78 Birds 77 13 90 Reptiles 14 22 36 Amphibians 11 10 21 Total 170 55 225 a. What is the probability that a species of Bird is randomly selected? 90/225 b. Two species are randomly selected without replacement. Find P(Reptile and
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Test_2_Review_Key - AT151 M 1 While staying in a hotel you...

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