A marble is drawn at random from the bag shown below. The bag contains 3 green, 4 yellow, 5 blue, and 8 pink marbles.

Im kind of confused, I'm assuming it's talking about how many are pink.
There's 20 marbles in total, and there's 8 pink marbels.
20 divided by 8 = 2.5
2.5 = 2/5
Answer: 2/5 (If it's talking about how many are not yellow then the answer would be 4/5)