Dr Griffin is a veterinarian who sees only dogs and cats In each appointment she may or may not give the animal a vaccine The

Question

Dr Griffin is a veterinarian who sees only dogs and cats In each appointment she may or may not give the animal a vaccine The two way frequency table summarizes Dr Griffin s 50 appointments last week Vaccine No vaccine Dog 12 13 Let vaccine be the event that a randomly chosen appointment from the table included a vaccine Let dog be the event that a randomly chosen appointment from the table involved a dog Find the following probabilities Write your answers as decimals If necessary consult a list of formulas a P vaccine 0 Cat 18 7 b P dog and vaccine c P dog vaccine

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