Posted by **C.J** on Saturday, January 23, 2010 at 5:09pm.

A jar contains four marbles, each a different color: red, blue, green and yellow. If you draw two marbles from the jar, one after another, replacing the first before drawing the second, what is the probability of getting

a. two red marbles

b. a red marble on the first draw and a green marble on the second draw

c. at least one red marble and one green marble.

d. no yellow marbles

Would someone be kind enough to help me sort this out. I am stuck on three problems for my math assignment this week.

- Math Probability question -
**PsyDAG**, Saturday, January 23, 2010 at 7:07pm
First you have to know how many marbles of each color are in the jar.

- Math Probability question -
**Reiny**, Saturday, January 23, 2010 at 9:35pm
you got one marble of each colour in the jar,

so the prob of any specific colour is 1/4

a) 1/4 x 14 = 1/16

b)1/4 x 1/4 = 1/16

c) poor wording.

you are only drawing 2 marbles, so it has to be R,G or GR

Since you are replacing it would be

1/4 x 1/4 x 2

= 1/8

d) 3/4 x 3/4 = 9/16

- Math Probability question -
**thanks !**, Sunday, January 24, 2010 at 1:01am
thank you for the help

## Answer this Question

## Related Questions

- Math - given a jar contains four marbles, each a different color: red, blue, ...
- Math - A jar contains four marbles, each a different color: red, blue, green, ...
- Math - given a jar contains four marbles, each a different color: red, blue, ...
- MATH Prob. - A jar contains four marbles, each a different color: red, blue, ...
- Math - given a jar contains four marbles, each a different color: red, blue, ...
- math/probability - A jar contains four marbles, each a different color: red, ...
- Statistics - 1.In a jar, suppose there are 3 blue marbles, 2 yellow marbles and ...
- Math ~ Check Answers ~ - ***PS: I can't put the diagram so I type it.*** The ...
- Probabilities - A jar contains 2 red marbles, 3 green marbles, 4 blue marbles, ...
- Algebra - A jar contains red, blue and yellow marbles.The number of red marbles ...