recent survey found that 70% of all adults over 50 wear sunglasses for driving. In a random sample of 10 adults over 50 what is the probability that at least 6 wear sunglasses?
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- You attend a karaoke night and hope to hear your favorite song. The karaoke song book has 300 different songs (your favorite song is among them). Assuming that the singers are equally likely to pick any song and no song repeats, what is the probability that your favorite song is one of the 20 that you hear that night?A manufacturer has determined that a machine averages one faulty unit for every 500 it produces. What is the probability that an order of 300 units will have one or more faulty units?