a)Suppose you are working in a lab, and you have 100 plates of cells, each of which has a 3% probability of yeast contamination. What is the expected number of plates that will be contaminated? b) If A and B are independent events, which of the following interpretations is appropriate? i. If A happens, then B cannot happen. ii. If B happens, then A must happen also. iii) If A happens it gives us no additional information about B. iv. The probabilities of the two events are the same: P(A) = P(B)

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