4.39 A company installs new central-heating furnaces and has found that for 15% of all installations, a return visit is needed to make some modifications. Six instal- lations were made in a particular week. Assume inde- pendence of outcomes for these installations. a. What is the probability that a return visit will be needed in all these cases?
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According to the problem, this probability is 15%, or 0.15. Show more…
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So, the question is that; A company installs new central-heating furnaces and has found that for 15% 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. What is the Probability that a return visit will be needed in all these cases? What is the probability that a return visit will be needed in none of these cases? What is the probability that a return visit will be needed in more than 1 of these cases?
Audrey F.
A company installs new central-heating furnaces and has found that for $15 \%$ 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. a. What is the probability that a return visit will be needed in all these cases? b. What is the probability that a return visit will be needed in none of these cases? c. What is the probability that a return visit will be needed in more than 1 of these cases?
61 percent of the homes constructed in the Caca Creek area include a security system. 14 homes are selected at random. What is the probability five of the selected homes have a security system? (Round the result to five decimal places if needed.)
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