Question

two bags each contain blue marbles and black marbles. the first contains 4 blue marbles and 6 black marbles and the second bag contains 6 blue marbles and 6 black marbles. a marble is randomly drawn from each bag. what is the probability that both marbles are blue?. a. 1/5. b. 1/12. c. 3/10. d. 1/10

Answer 1

There are two bags: a bag with 4 blue marbles and 6 black marbles and another one containing 6 blue marbles and 6 black marbles. the probability of getting a blue marble in the first bag is 6/10 or 3/5 while that on the second bag is 6/12 or 1/2. Hence the total probability of getting two marbles is c. 3/10.