Question

A bag has 5 red marbles, 6 black marbles and 4 blue marbles. What is the probability of picking a red
marble, replacing it, and then picking a blue marble?

Answer 1

so let's take it one step at a time, starting with the red

red marbles/total marbles = ?

Answer 2

5/15 or 1/3

Answer 3

awesome

now, it says we replace the marbles, so the total # remains the same

blue marbles/total marbles = ?

Answer 4

4/15

Answer 5

awesome

so to get the solution we multiply the two probabilities: (1/3)*(4/15) = ?

Answer 6

4/45

Answer 7

awesome so that's your solution

Answer 8

:D