Twenty percent of the customers of a grocery store use an express checkout. Consider six randomly...

Twenty percent of the customers of a grocery store use an express checkout. Consider six randomly selected customers.

a) What is the probability that exactly one of the six customers uses the express checkout? (round to three decimal places)

b) What is the probability that none of the six use express checkout? (round to three decimal places)

c) What is the probability that at least two of the customers use express checkout? (round to three decimal places)

d) Letting X denote the number among the six who use express checkout, what is the mean value of X? (round to one decimal place)

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orchestra answered 1 year ago

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