I have a pack of jelly beans that has 20 jelly beans inside, 5 are yellow, 5 are purple, 5 are green and 5 are white; what is the probability that I

 I have a pack of jelly beans that has 20 jelly beans inside, 5 are yellow, 5 are purple, 5 are green and 5 are white; what is the probability that I will pull out a purple jelly bean considering that I gave away one purple? Also, what is the probability that I will pull out a purple considering they gave the other purple back and I have all the jelly beans again?