A company has 10 PCs in stock. Although the equipment is new, there are 4 that do not work properly. There is a requirement for 5 teams in a department and the warehouse picks the teams. a) What is the probability that all equipment works correctly? b) What is the probability that at most 3 devices work correctly? c) The expected value, the variance and the standard deviation.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section: Chapter Questions
Problem 14T: An unbalanced coin is weighted so that the probability of heads is 0.55. The coin is tossed ten...
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A company has 10 PCs in stock. Although the equipment is new, there are 4 that do not work properly. There is a requirement for 5 teams in a department and the warehouse picks the teams.

a) What is the probability that all equipment works correctly?

b) What is the probability that at most 3 devices work correctly?

c) The expected value, the variance and the standard deviation.

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