A golf ball is selected at random from a golf bag. If the golf bag contains 7 green balls, 6 yellow balls, and 6 black balls, find the probability of the following event. The golf ball is green or...

Extracted text: A golf ball is selected at random from a golf bag. If the golf bag contains 7 green balls, 6 yellow balls, and 6 black balls, find the probability of the following event. The golf ball is green or yellow. The probability that the golf ball is green or yellow is (Type an integer or a decimal rounded to three decimal places as needed.)