A public survey reported that 5% of the people now in the community are afraid of walking alone in the evening. If a random sample of 20 persons is selected, find the probability that: (a) there are exactly 5 persons in the sample who are afraid of walking alone in the evening; (b) there are at most 4 persons in the sample who are afraid of walking along in the evening; and (c) there are at least 4 persons in the sample who are afraid of walking along in the evening.

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College Algebra

10th Edition

ISBN:9781337282291

Author:Ron Larson

Publisher:Ron Larson

Chapter8: Sequences, Series,and Probability

Section8.7: Probability

Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...

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A public survey reported that 5% of the people now in the community are afraid of walking alone in the evening. If a random sample of 20 persons is selected, find the probability that: (a) there are exactly 5 persons in the sample who are afraid of walking alone in the evening; (b) there are at most 4 persons in the sample who are afraid of walking along in the evening; and (c) there are at least 4 persons in the sample who are afraid of walking along in the evening.

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