Posted by **Michelle** on Saturday, November 27, 2010 at 10:31am.

Bert has a bag with 12 blue marbles, 6 green marbles, 8 purple marbles, and 4 red marbles. If he want the probability of picking a blue marble to be 1/2 what should he do?

- Math -
**Jen**, Saturday, November 27, 2010 at 10:34am
Right now the probability of picking blue would be 12/30. If you add another blue it would be 13/31, then 14/32, 15/33, 16/34, 17/35, 18/36. 18/36=1/2, so if he wants the probability to be 1/2 he needs to add 6 more blue.

## Answer this Question

## Related Questions

math - sally has a bag with red,blue, and green marbles. She has twice as many ...

math - A bag contains x marbles. Half of the marbles are blue. Four less than ...

Math - A bag contains nine red marbles, four green marbles, three blue marbles, ...

Probability? - A bag contains 7 green marbles, 9 red marbles, 10 orange marbles...

math check probability - 5. A bag contains 7 green marbles and 4 white marbles. ...

math - a bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown...

Math, please check work - A bag contains 7 red marbles, 2 blue marbles, and 1 ...

math - There are 25 red, blue, yellow and green marbles in a bag. Four of the ...

Algebra - A bag has 2x+1 red marbles, 3x blue marbles, and x+2 green marbles. ...

algebra2/ Trigonometry - A bag contains 24 green marbles, 22 blue marbles, 14 ...