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6. A blood bank catalogs the types of blood O. A. B. AB TOTAL Positive. 130 134 45 20 329 Negative.23 15 12 25 75

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6. A blood bank catalogs the types of blood O. A. B. AB TOTAL Positive. 130 134 45 20 329 Negative.23 15 12 25 75 Total. 153 149 57 45 404 a) Find the probability that a donor selected at random has type O or type A b) Find the probability that donor selected random has type B blood or negative

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