CONDITIONAL AND MARGINAL PROBABILITY - Statistics and probability 1) Suppose that of all individuals who purchase a certain digital camera, 60% include an optional memory card in their purchase, 40% include an extra battery, and 30% include both a card and a battery. . Consider randomly selecting a buyer and let A:{purchased memory card} and B={purchased battery}. So P(A) = 0.60. P(B) = 0.40 and P(A ∩ B) = 0.30. a) If the selected individual chose an extra battery, what is the probability that an extra card will also be acquired? b) If the selected individual chose an extra card, what is the probability that an extra battery will also be acquired?

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