5. The Source in Jackson Square sells iPads with scroll wheels that fail in 0.5% of...

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5. The Source in Jackson Square sells iPads with scroll wheels that fail in 0.5% of the units. They just received a shipment of 50 iPads. a. What is the probability that at most two of the iPads in the shipment will be defective? [4] b. How many customer returns should The Source expect to have from this shipment (i.e. what is the expected number of defective iPads)? [2] 6. The door prizes at a charity concert are eight - $20 gift certificates, five - $40 gift certificates, five - $60 and six - $100 gift certificates. Just before the concert starts, the prize envelopes are mixed in a bag, and ten prizes are drawn at random. a. What is the probability that none of the ten pre-concert prizes is a $20 gift certificate? [3] 5. The Source in Jackson Square sells iPads with scroll wheels that fail in 0.5% of the units. They just received a shipment of 50 iPads. a. What is the probability that at most two of the iPads in the shipment will be defective? [4] b. How many customer returns should The Source expect to have from this shipment (i.e. what is the expected number of defective iPads)? [2] 6. The door prizes at a charity concert are eight - $20 gift certificates, five - $40 gift certificates, five - $60 and six - $100 gift certificates. Just before the concert starts, the prize envelopes are mixed in a bag, and ten prizes are drawn at random. a. What is the probability that none of the ten pre-concert prizes is a $20 gift certificate? [3]

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