Nokia supplies mobile phones in lots of 25, and they have a reported defective rate of 0.075%. What is the probability of an individual phone being defective? If a quality control engineer wants to carefully analyze a defective mobile phone, what is the probability of her getting at least one defective phone in a lot of 25? Is the probability high enough that the engineer can be reasonably sure of getting a defective mobile phone that can be used for her analysis?
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