Bicycle sales
A buyer for a department store estimates that the number of mountain bicycles sold during the summer season will range between 40 and 90 with the distribution - number of bicycles sold - 40, 50, 60, 70, 80, 90 with the probability of sale - 0.05, 0.15, 0.4, 0.35, 0.04, 0.01. What is the expected quantity of bicycles sold and with what variance? If 65 bicycles are ordered, what is the probability that some will remain unsold?
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