A box contains 5 yellow balls, 3 blue, and 1 red ball. Two balls are drawn at random. Find the probability that the two balls are yellow

Answer 1

started with 9 balls, five of them are yellow
5/9
then we have 8 balls, four of them are yellow
1/2
so
5/9 * 1/2 = 5/18

Answer 2

There are 8 balls inside the box that consists of 2 blue balls and 6 yellow balls. What is the probability of getting yellow balls?

Answer 3

3/16

Answer 4

5/18