What is the probability that you will get card number 3

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Post Cereals has decided to run a promotion whereby they are putting 10 different Yu-Gi-Oh cards in specially marked boxes of cereal. Card number 3 is the most sought after card in the series.

a. What is the probability that you will get card number 3 without having to buy more than 3 boxes of specially marked cereal? (Assume that all cards are equally likely).

b. Suppose you are unlucky and you don't get card number 3 in the first 3 boxes you buy. On average, how long will you have to wait to get card number 3?

Reference no: EM13614795

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