Abag of marbles has 5 green, 2 yellow, 8 red, and 3 purple marbles. what is the probability of picking a red marble, not replacing it, and then picking another red marble?

Sample space ={5G, 2Y, 8R, 3P} =18 POSSIBLE OUTCOME

1st draw: P(R) = 8/18 = 4/9 = 0.444
2nd draw (no replacement, means already one Red is picked up, so the sample space has been reduced): P(another one more RED) = 7/17 =0.411 

The answer is the numbers between =5 and 5