What is the probability of drawling two blue marbles if the first marble IS placed back in the bag before the second draw?

Question

These marbles are placed in a bag and two of them are randomly drawn. There are 3 pink, 2 yellow, and 5 blue marbles

Answer 1

25% chance of randomly drawing 2 blue

if there are 1/2 blue marbles

3 pink 2 yellow, 5 blue means 5/(3+2+5) = 5/10 = 1/2 blue

P(2 blue) = (1/2)(1/2) = 1/4 = .25 = 25%