In a follow-up survey of people who purchased netbook computers, the buyers were asked if they were satisfied with their purchase. The answers were classified according to whether or not the netbook had more than 1 GB of RAM. The probability table shown in Exhibit 4.31 was created.

a. What is the probability that a customer who bought a netbook computer was satisfied with his/her purchase?
b. What is the probability that a customer who bought a netbook with more than 1 GB of RAM was satisfied with his/her purchase?
c. Does the amount of RAM affect whether the purchaser was satisfied with his/her purchase? You must use probabilities to answer this question.

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Not Satisfied 0.05 Satisfied 0.30 1 GB of RAM or Less More than I GB of 0.50 RAM 0.15