Welcome to Westonci.ca, where your questions are met with accurate answers from a community of experts and enthusiasts. Experience the ease of finding quick and accurate answers to your questions from professionals on our platform. Connect with a community of professionals ready to provide precise solutions to your questions quickly and accurately.

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.