If two events A and B are such that Pr(A) = 0.5, Pr(B) = 0.3, and Pr(A and B) = 0.1 I Find: a) Pr(A/B) b) Pr(BIA) c) Pr(A| A or B) d) Pr(A| A and B) e) Pr(A and B | A or B) 2.149 A large group of people is to be checked for two common symptoms of a certain disease. It is thought that 20% of people have symptom A alone, 30% have symptom B alone, and 10% show both symptoms. The remaining people have no symptoms. For a person chosen from the group: a) Find the Probability that they have neither symptom. b) Find the probability that they have at least one symptom. c) Find the probability that the person has both, given that they have B.