vacuum cleaner company has three machines, each making electric cords.
Machine 1 is the oldest and of all units it produces 1.2% do not meet quality standard (of not being damaged after an abrupt change of voltage). Machine 2 produces 0.8% of bad units, while the newest, machine 3, makes 0.5% of units with unacceptable quality. Of all the cords produced, 20% are made on machine 1, 35% are made on machine 2 and the rest on the machine 3. The cord is used as a part of vacuum cleaner that the company makes. If a customer randomly buys a vacuum cleaner produced by this company, what is the probability that the cord does
not meet the quality standard?
impatient much?
Once is enough, thank you.
Repeated postings will not get faster or better responses.
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