In an auditorium with 500 people, one person will be chosen to win a $100...

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In an auditorium with 500 people, one person will be chosen to win a $100 gift card. The rest of the people will receive a $0.25 key chain.What is the probability that you will be chosen to win the gift card?What is the probability that you will receive a key chain?Find the expected value.

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