Posted by **Tim** on Saturday, October 1, 2011 at 2:39am.

There are 20 balls in a bowl. 7 black, 6 blue, 5 green, 4 red, and 3 yellow. Balls must be drawn until 4 different colors are drawn. What is the probability that one is black?

Please walk me through if you can...

## Answer this Question

## Related Questions

- Math for the middle school and elementary teacher - 3 red balls, 4 green balls, ...
- math - Assume that the box contains 5 balls: 1 yellow, 2 green, and 2 red. Balls...
- Math - A bag contains 5 balls,8 white balls, 9 green balls,7 blue balls& 6 ...
- statistics - Two urns each contain yellow balls and black balls. Urn 1 contains ...
- Basic Mathematics - A bag contains 2 red balls, 3 blue balls and 5 green balls. ...
- pshs - three balls are drawn successively from a box containing 6 red balls,...
- Math - A box contains 2 white calls and 7 pink balls. Two balls are drawn at ...
- IT/210 CheckPoint Iteration Control Structure - Need help with this! Uses a ...
- math - A box contains 6 red balls, 4 white balls, and 5 green balls. If three ...
- probability - a bag contains 7 red balls, 4 green balls and 5 yellow balls. what...