Data Management & Probability

Option 1: You pull a cube out of the bag, record the colour, and then return it to the bag. Then you pick another cube. What is the probability that the cubes are the same colour?

Option 2: You pull a cube out of the bag, record the colour, and do not return it to the bag. Then you pick another cube. What is the probability that the cubes are the same colour?

A bag contains 3 red cubes, 2 green ones, and 1 blue one.