a vendor has 18 balloons for sale: 9 are yellow, 3 are red, and 6 are green. a balloon is selected at random and sold. if the balloon sold is yellow, what is the probability that the next balloon selected at random is also yellow?
After the first sale, you have 8 yellow ones left, in a total bunch of 17 balloons. The probability that the next random draw is a yellow one is. 8/17 = about 47.1% .
