A bag contains 5 red balls and 3 blue balls. Two balls are drawn at random without replacement. What is the probability that the two balls are of different colors?
Correct: A
There are two ways to draw two balls of different colors: red then blue (RB), or blue then red (BR). The probability of RB is (5/8) * (3/7) = 15/56. The probability of BR is (3/8) * (5/7) = 15/56. The total probability is 15/56 + 15/56 = 30/56 = 15/28.