(Solved): (4) An un contains 4 blue marbles and 3 red marbles. If you randomly choose 2 marbles without repla ...

(4) An un contains 4 blue marbles and 3 red marbles. If you randomly choose 2 marbles without replacenert, what is the probabilit \( y \) that: (a) Exactly one marble is blue? (a) (b) Both marbles are red? (c) At least one marble is red? (d) At least one marble is blue?