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16 questions
An urn contains 2 orange marbles and 5 blue marbles. A marble is drawn at random and replaced. Then a second marble is drawn. What is the probability that the first marble is orange and the second marble is blue?
An urn contains 6 purple marbles and 4 pink marbles. A marble is drawn at random and not replaced. Then a second marble is drawn. What is the probability that both marbles are purple?
An urn contains 5 orange marbles and 6 blue marbles. Two marbles are drawn at random. What is the probability that the first marble is orange and the second marble is blue if the marbles are drawn with replacement?
John has a mug that contains seven Greek coins and 5 roman coins. A coin is drawn at random and not replaced. Then another coin is randomly drawn. What is the probability that the first coin was Greek and second coin was Roman?