)a bag has 7 red marbles, 8 blue marbles and 3 black marbles. what is the probability of picking a blue marble, replacing it, and then picking a red marble? answer a. 14/81 b. 7/108 c. 2/27 d. 1/9 2.)a bag has 7 red marbles, 8 blue marbles and 3 black marbles. what is the probability of picking a black marble, replacing it, and then picking a red marble? answer a. 2/27 b. 7/108 c. 14/81 d. 1/9