Question

There is a bag filled with 5 blue, 6 red and 2 green marbles.
A marble is taken at random from the bag, the colour is noted and then it is replaced.
Another marble is taken at random.
What is the probability of getting exactly 1 blue?

Answer 1

5/13 is the probability of getting a blue marble

Answer 2

Answer:

Since the selected marble is replaced, the probability of getting a 2nd R = 6/13 as well. Thus the probability of getting 2R after 2 marble draws = (6/13)^2 = 36/139 = . 2589928…~ 25.9%.