A company installs new central-heating furnaces and has found that for 22% of all installations, a return visit is needed to make some modifications. Six installations were made in a particular week. Assume independence of outcomes for these installations. Complete parts a. through c. below. a. What is the probability that a return visit will be needed in all these cases?

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A company installs new central-heating furnaces and has found that for 22% of all installations, a return visit is needed to make some modifications. Six installations
were made in a particular week. Assume independence of outcomes for these installations. Complete parts a. through c. below.
a. What is the probability that a return visit will be needed in all these cases?
Transcribed Image Text:A company installs new central-heating furnaces and has found that for 22% of all installations, a return visit is needed to make some modifications. Six installations were made in a particular week. Assume independence of outcomes for these installations. Complete parts a. through c. below. a. What is the probability that a return visit will be needed in all these cases?
For a binomial probability function with P = 0.6 and n = 12, find the probability that the number of successes is equal to 7 and the probability that the number of
successes is fewer than 6.
P(7 successes)= 0.227 (Round to three decimal places as needed.)
P(fewer than 6 successes
(Round to three decimal places as needed.)
Transcribed Image Text:For a binomial probability function with P = 0.6 and n = 12, find the probability that the number of successes is equal to 7 and the probability that the number of successes is fewer than 6. P(7 successes)= 0.227 (Round to three decimal places as needed.) P(fewer than 6 successes (Round to three decimal places as needed.)
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