Question

Suppose a jar contains 12 red marbles and 21 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.

Answer 1

Answer: Total balls in jar=9+33=42

Probability getting first red ball=9/42=3/14

Probability getting second red=8/41

Probability getting both red=3/14(8/41)

=12/287

Explanation: