Approximately 85% of electronic stores marked up the price for a new headset. Suppose a random sample of 12 stores is selected. a. What is the probability that no fewer than 5 of the workers in the sample marked up the price? b. Find the expected value and its standard deviation.

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08-04-2021
Mathematics

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Approximately 85% of electronic stores marked up the price for a new headset. Suppose a random sample of 12 stores is selected. a. What is the probability that no fewer than 5 of the workers in the sample marked up the price? b. Find the expected value and its standard deviation.

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