Twelve refrigerators of a certain brand were returned to the manufacturer because of an audible…
Twelve refrigerators of a certain brand were returned to the manufacturer because of an audible high-pitched noise. Of those, 5 have a faulty compressor and 7 have less serious problems. The manufacturer's repair person randomly selects 6 to work on today. a. What is the most number of refrigerators with a faulty compressor they will need to repair today? Twelve refrigerators of a certain brand were returned to the manufacturer because of an audible high-pitched noise. Of those, 5 have a faulty compressor and 7 have less serious problems. The manufacturer's repair person randomly selects 6 to work on today. b. What is the expected number of fridges with a faulty compressor among the 6 selected? Twelve refrigerators of a certain brand were returned to the manufacturer because of an audible high-pitched noise. Of those, 5 have a faulty compressor and 7 have less serious problems. The manufacturer's repair person randomly selects 6 to work on today. c. What is the standard deviation for the number of fridges with a faulty compressor among the 6 selected? Twelve refrigerators of a certain brand were returned to the manufacturer because of an audible high-pitched noise. Of those, 5 have a faulty compressor and 7 have less serious problems. The manufacturer's repair person randomly selects 6 to work on today. d. If there are more than 3 fridges with a faulty compressor among the 6, the repair person will not be able to finish during their shift. What is the probability they will not be able to finish? Twelve refrigerators of a certain brand were returned to the manufacturer because of an audible high-pitched noise. Of those, 5 have a faulty compressor and 7 have less serious problems. The manufacturer's repair person randomly selects 6 to work on today. e. The repair person spends 1.5 hours repairing a faulty compressor and 0.75 hours repairing the less serious problems. What is the repair person's total expected time in hours making repairs on the 6 selected? (you need to account for both types of repairs.) May 11 2022 01:56 AM
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