Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 7 of which have electrical defects and 18 of which have mechanical defects. (a) How many ways are there to randomly select 7 of these keyboards for a thorough inspection (without regard to order)? X ways (b) In how many ways can a sample of 7 keyboards be selected so that exactly two have an electrical defect? x ways (c) If a sample of 7 keyboards is randomly selected, what is the probability that at least 6 of these will have a mechanical defect? (Round your answer to four decimal places.)

MATLAB: An Introduction with Applications
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Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 7 of which have electrical defects and 18 of which have mechanical defects.
(a) How many ways are there to randomly select 7 of these keyboards for a thorough inspection (without regard to order)?
X ways
(b) In how many ways can a sample of 7 keyboards be selected so that exactly two have an electrical defect?
X ways
(c) If a sample of 7 keyboards is randomly selected, what is the probability that at least 6 of these will have a mechanical defect? (Round your answer to four decimal places.)
X
Transcribed Image Text:Computer keyboard failures can be attributed to electrical defects or mechanical defects. A repair facility currently has 25 failed keyboards, 7 of which have electrical defects and 18 of which have mechanical defects. (a) How many ways are there to randomly select 7 of these keyboards for a thorough inspection (without regard to order)? X ways (b) In how many ways can a sample of 7 keyboards be selected so that exactly two have an electrical defect? X ways (c) If a sample of 7 keyboards is randomly selected, what is the probability that at least 6 of these will have a mechanical defect? (Round your answer to four decimal places.) X
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