A university conducted a survey of 383 undergraduate students regarding satisfac

Question

A university conducted a survey of 383 undergraduate students regarding satisfaction with student government. Results of the survey are shown in the table by class rank. Complete parts (a) through (d) below? Click the icon to view the table. (a) If a survey participant is selected at random, what is the probability that he or she is satisfied with student government? P(satisfied) = (Round to three decimal places as needed.) (b) If a survey participant is selected at random, what is the probability that he or she is a junior? P(junior) = (Round to three decimal places as needed.) (c) If a survey participant is selected at random, what is the probability that he or she is satisfied and a junior? P(satisfied and junior) = (Round to three decimal places as needed.) (d) If a survey participant is selected at random, what is the probability that he or she is satisfied or a junior? P(satisfied or junior) = (Round to three decimal places as needed.)

Explanation / Answer

a) P(satisfied) = 237/383 = 0.619

b) P(junior) = 92/383 = 0.240

c) P(satisfied and junior) = 64/383 = 0.167

d) P(satisfied or junior) = P(satisfied) + P(junior) - P(satisfied and junior)

                                     = 237/383 + 92/383 - 64/383

                                     = 0.692

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