Find the variance Suit Sales The number of suits sold per day at a retail store is shown in the table, with the corresponding probabilities.Number of suits sold X1920212223Probability P (X)0.10.20.30.10.3Send data to Excel

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Answered: Find the variance

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter14: Counting And Probability

Section14.2: Probability

Problem 68E

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Telephone Marketing A mortgage company advertises its rates by making unsolicited telephone calls to random number. About 2% of the calls reach consumers who are interested in the company’s services. A telephone consultant can make 100 calls per evening shift. What is the probability that two or more calls will reach an interested party in one shift? How many calls does a consultant need to make to ensure at least a 0.5 probability of reaching one or more interested parties? [Hint: Use trial and error.]
Telephone Marketing A mortgage company advertises its rates by making unsolicited telephone calls to random numbers. About 2 of the calls reach consumers who are interested in the companys services. A telephone consultant can make 100 calls per evening shift. a What is the probability that two or more calls will reach an interested party in one shift? b How many calls does a consultant need to make to ensure at least a 0.5 probability of reaching one or more interested parties? Hint: Use trial and error.
Quality Control To control the quality of their product, the Bright-Light Company inspects three light bulbs out of each batch of ten bulbs manufactured. If a defective bulb is found, the batch is discarded. Suppose a batch contain two defective bulbs. What is the probability that the batch will be discarded?
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