Question

Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.

The diagram below shows the contents of a jar from which you select marbles at random.

An illustration of a jar of marbles is shown. Four of the marbles are labeled with an upper R, seven of the marbles are labeled with an upper B, and five of the marbles are labeled with an upper G. The key identifies upper R to represent red marbles, upper B to represent blue marbles, and upper G to represent green marbles.

What is the probability of selecting a red marble, replacing it, and then selecting a blue marble? Show your work.
What is the probability of selecting a red marble, setting it aside, and then selecting a blue marble? Show your work.
Are the answers to parts (a) and (b) the same? Why or why not?

Answer 1

i tried looking it up but nobody had answered

Answer 2

yes, mathhelper already gave you the answer, in your previous post.

Answer 3

They are not the same because you have a bigger population to choose from if you put the first one back and therefore your chance of getting what you want goes down.