SOLUTION: Hi, I was wondering if you could help me solve this probability question and check if my answers are correct. Question: Adam bought a package of marbles and sorted all of them

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Question 432249: Hi,
I was wondering if you could help me solve this probability question and check if my answers are correct.
Question: Adam bought a package of marbles and sorted all of them by color as shown in the accompaning graph.
a) What is the total number of marbles in the package?
* 12marbles
b) If one marble is selected at random, find the probability that it is red, black, or yellow.
* 8/12 marbles
c) If two marbles were selected at random, with replacement, find the probability that
1) the first marble was red and the second was yellow.
* -3/12 marbles

2) one of the two marbles was blue
* 0/12
d) If two marbles were selected at random, without replacement, find the probability that
1) two red marbles were selected
*3/23
2) neither marble selected was red or black
*9/12

Amount of Marbles
Red: 2
White: 4
black: 1
yellow: 5
( there were no blue marbles in the bar grapg)

Thanks for all your help. It is greatly appreciated.
Answer by sudhanshu_kmr(1152) (Show Source):
You can put this solution on YOUR website!

C)
1). (2/12) * (5/12)
= 5/72

2). 0/12
=0

d)
1) 2C2 / 12C2
= 1/66
2)
9C2/12C2
= 36/66
= 6/11

other solutions are correct.