Question

Please help!
A bag has 4 green marbles, 3 red, and 2 yellow. What is the probability that you pick a red marble, do not replace it, then pick a yello marble?

Answer 1

Choices are:
2/15
1/15
1/9
1/10

1/9 Is NOT correct!

Answer 2

If you take out a red and don't replace it then you now have 4 green, 2 red, and 2 yellow. Probability is the part over the whole. So it's 2 yellow/ 8 = 1/4. ... now I'm confused. That's not an answer choice.

Answer 3

Yeah! Now you can see why i need help lol.

Answer 4

I'm correct about the meaning of probability so I'm not sure.

Answer 5

Yeah! I have no idea

Answer 6

A bag has 4 green marbles, 3 red, and 2 yellow. What is the probability that you pick a red marble, do not replace it, then pick a yellow marble?

First find the total: 9 marbles.

There's 3 reds. Chance of picking a red is thus 3/9. Since we don't replace it, there's now only 8 remaining marbles. There are 2 yellow, so the chance of picking a yellow is 2/8.

To find the probability of picking a red and then a yellow, multiply those two probabilities together:\[\frac{ 3 }{ 9 } \times \frac{ 2 }{ 8 } = \]

Answer 7

OH!!! That makes sense! xD

Answer 8

It's the probability of doing the two actions in succession. That's why I was wrong.

Answer 9

But that gives 1/12, which also isn't an answer choice... even though I'm pretty sure that's the correct solution.

Answer 10

Unless there's an error in the question

Answer 11

O_o

Answer 12

thanks guys!