Your welcome.

]]>Thanks again

]]>Here is the tree the two you need are marked by a rectangle. Please fill in the probabilities.

]]>I know that I am doing something wrong]]>

Count up all nodes at the bottom that have exactly one yellow. What do you get?

]]>The first two are correct.

The third answer I am getting

15 / 28

When stuck for homework type problems. Draw a tree!

Do I divide by two for the probability that exactly one marble is yellow?

You multiply in this case because there are two. The tree will make it clear.

]]>What is the probability that both marbles are yellow

Pr(YY)=3/28

I did 3/8*2/7=3/28

What is the probability that they are both green?

Pr(GG)=5/14

I did 5/8*4/7=5/14

what is the probability that exactly one marble is yellow?

there were two chances of this

I did 3/8*5/7=15/56 and 5/8*3/7=15/56

Do I divide by two for the probability that exactly one marble is yellow?

I am not sure if I have done all of the steps for any of the questions. Can someone look over my work and give me advice?

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