There are 3 red marbles, 5 green marbles, and 2 blue marbles in a bag. which of the following are true?

the probability of randomly drawing either a red marble or a green marble is 80%.
the probability of randomly drawing a red marble and then a green marble is 1/6 .
the probability of not drawing a blue marble is 20%.
the probability of drawing a green marble is the same as the probability of drawing either a red or a blue marble.