If a ball is selected at random from a box containing 3 red, 6 blue, and
9 yellow identical balls, find the
probability that the drawn ball is NOT red NOR yellow.
The probability of event occurring is equal to the number of favorable outcomes divided by the total number of possible outcomes in the sample space, . In this case, event is drawing a ball that is neither red nor yellow. In other words, event is drawing a blue ball. Find the probability of event as follows:
Thus, the probability of drawing a ball that is neither red nor yellow is .