Question

an urn contains 10 blue marbles and 8 yellow marbles a marble is drawn and dropped back into the urn. Then a second marble is drawn and dropped back into the urn both marbles are yellow if another marble is drawn. what is the probability that it will be blue

Answer 1

Answer:

80/729

Step-by-step explanation:

8/18x8/18x10/18=640/5832

80/729