# Math

A bag holds 8 yellow marbles and 5 orange marbles. How many and what color marbles would you add to the bag so that the probability of picking a yellow marble is 2/3?

1. 👍 0
2. 👎 0
3. 👁 138
1. lets add x yellow marbles

so (x+8)/(x+13) = 2/3
3x + 24 = 2x + 26
x = 2

or

8/(y+13) = 2/3
2y + 26 = 24
2y = -2
y = -1

or we could take out 1 orange marble
Proof:
yellow = 8
orange = 4
total = 12
prob of yellow = 8/12 = 2/3

1. 👍 0
2. 👎 0
posted by Reiny

## Similar Questions

1. ### math

A bag holds 8 yellow marbles and 5 orange marbles.How many and what color marbles would you add to the bag so that the probability of picking a yellow marble is 2/3

asked by kyara Vargas on April 10, 2011
2. ### math

A bag holds 8 yellow marbles and 5 orange marbles. How many and what color marbles could you add to the bag so that the probability of picking a yellow is 2/3?

asked by shion on February 25, 2012
3. ### math

A bag holds 3 yellow marbles and 7 blue marbles. how many and what color marbles could you add to the bag so that the probability of picking a yellow marbles is 1/4?

asked by shion on February 25, 2012
4. ### Math

A bag contains 3 red marbles, 5 yellow marbles and 6 orange marbles. Three marbles are drawn and NOT replaced each time. Determine the probability of drawing three yellow marbles in a row. State whether the events are dependent or

asked by Jac on December 17, 2014
5. ### Math

A bag contains 3 red marbles, 5 yellow marbles and 6 orange marbles. Three marbles are drawn and NOT replaced each time. Determine the probability of drawing three yellow marbles in a row.

asked by Lola on February 24, 2011
6. ### GEOMETRY

A bag contains 3 yellow marbles, 4 green marbles, 6 purple marbles, and 2 orange marbles. If a marble is drawn from the bag, what is the probability that it is orange? (Write your answer as a fraction in lowest terms.)

asked by TIERNEY on June 26, 2016
7. ### Math

Say that a bag contains 100 marbles: 30 red, 30 blue, 30 green, plus a mix of 10 yellow and orange marbles. To be certain that you have 10 marbles of the same color, what is the minimum number you would need to remove (without

asked by Cyndie on March 12, 2012
8. ### Math

Yes, it is I again, with yet another math problem. The question is; In a bag, there are 8 white marbles, 8 blue marbles, 7 red marbles, and 6 yellow marbles. How many marbles does it take to pull out 3 marbles of the same color.

asked by Tom on November 16, 2014
9. ### Discrete Math

A bag contains 5 red marbles, 4 yellow marbles, 3 green marbles, 2 orange marbles and 2 purple marbles. If three marbles are removed, what is the probability that at least one of them is red?

asked by Steven on January 19, 2014
10. ### Statistics

a bag of colored marbles holds 71 yellow marbles and 70 white marbles. ten marbles are randomly selected, one at a time, without replacement. what is the probability that more than half are yellow?

asked by Renee on October 19, 2015

More Similar Questions