Question in description as words are alot

Question

A bag contains 10 red marbles and and 5 blue. Joe randomly selects 3 marbles from the bag. Joe wants to determine the probability that the marbles selected are blue. Joe performs the experiment twice. The first time he chooses 3 marbles he replaces each marble before selecting the new one. The second time he chooses the three marbles he doesn’t replace each marble before selecting the next one. After Joe finds these two probabilities he decides he wants to compare the two probabilities numerically.Which expresses the numerical comparison correctly?

Answer 1

Return marbles:

5/15 • 5/15 • 5/15 five chances out fifteen each time

1/3 • 1/3 • 1/3 = 1/27

no return:

5/15 • 4/14 • 3/13 =

1/3 • 2/7 • 3/13 = 2/91

when you do not return the marbles you decrease your chances