According to the American Dental Association, 60% of all dentists use nitrous oxide (laughing gas) in their

According to the American Dental Association, 60% of all dentists use nitrous oxide (€œlaughing gas€) in their practice. If x equals the number of dentists in a random sample of five dentists who use laughing gas in practice, then the probability distribution of x is

a. Find the probability that the number of dentists using laughing gas in the sample of five is less than 2.
b. Find E(x) and interpret the result.
c. Show that the distribution of x is binomial with n = 5 and p = .6.

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plx) 0102 0768 2304 3456 2592 .0778