Posted by **Chris** on Tuesday, January 29, 2013 at 10:54pm.

Can somebody help me solve this problem ? I am not so good with probability. -

A bag contains 2 green marbles and 3 white marbles. One marble is drawn at random and not replaced.

Then a second marble is drawn. What is the probability that the first marble is white and the second one

is green?

- Math -
**Reiny**, Tuesday, January 29, 2013 at 10:58pm
Prob(white, then green)

= (3/5)(2/4) = 3/10

Can you tell where my numbers came from ?

- Math -
**Chris**, Tuesday, January 29, 2013 at 11:01pm
3/5 came from the probability of drawing White marbles. I am not sure about the (2/4)

- Math -
**Reiny**, Tuesday, January 29, 2013 at 11:22pm
since you kept the first marble drawn, there are now only 4 left, but the 2 greens are still in there

so 2/4 for the greens

- Math -
**Chris**, Tuesday, January 29, 2013 at 11:23pm
Okay , that makes sense .

## Answer This Question

## Related Questions

- Math - A bag contains 2 white marbles and 7 purple marbles. Two marbles are ...
- College math - A bag contains 9 white 7yellow marbles,8 green marbles. If one ...
- Math HELP! Ms.Sue - A bag contains 2 white marbles and 7 purple marbles. Two ...
- HELP!! MATH! - A bag contains 2 white marbles and 7 purple marbles. Two marbles ...
- Marbles - A bag contains 10 green marbles, 9 white marbles, 7 red marbles. If ...
- Math - A bag contains 4 green marbles, 6 red marbles, and 2 white marbles. Three...
- math - A bag contains 8 green marbles,5 blue marbles, and 4 white marbles,If one...
- Math :( - A bag contains 2 white marbles and 7 purple marbles. Two marbles are ...
- elem math core - A bag contains one each of red, blue, green, yellow and white ...
- Math - A bag contains 4 green marbles, 6 red marbles, and 2 white marbles. Three...

More Related Questions