Posted by **Anonymous** on Monday, January 19, 2009 at 9:08pm.

A bag soccer balls contains 8 balls with black design and 7 balls with red design with no other types of soccer balls. Coach graves reaches into the bag and randomly pulls out two soccer balls.

please check my answer

a) explain these events are either dependent or independent.

i think this is independent because the coach just randomly chooses the ball.

b) what is the propability both of the balls will be the ame design color?

is it 98/15.....

- math -
**Reiny**, Monday, January 19, 2009 at 9:33pm
Since probability is a value between zero and 1, you should have realized immediately that your answer made no sense.

prob of 2 black balls = 8/15 * 7/14 = 56/210

prob of 2 red balls = 7/15 * 6/15 = 42/210

so the prob of either 2 black OR 2 red balls = 98/210 = 7/15

(notice that the only other possibility would have been to have a black and then a red which would be

2(8/15 / 7/14) = 8/15

and 7/15 + 8/15 = 1 )

## Answer This Question

## Related Questions

- algebra...urgent help - A bag soccer balls contains 8 balls with black design ...
- Maths - Bag A contains 2 white, 1 black and 3 red balls, Bag B contains 3 white...
- Math - A bag contains three black balls, four white balls and five red balls. ...
- MATH 12 HELP! - One bag contains 4 white balls and 6 black balls. Another bag ...
- Math - A bag contains 33 balls: 10 blue, 11 red, and 12 green. If a person will ...
- Math - A bag contains 33 balls: 10 blue 11 red and 12 green If a person will ...
- IT/210 CheckPoint Iteration Control Structure - Need help with this! Uses a ...
- GEOMETRY - from a bag containing 6 white balls, 3 black balls and 13 red balls, ...
- Statistics HELP - There are two bags each containing red balls and yellow balls...
- Math - A bag contains 5 red balls and 4 white balls. Two balls are drawn at ...

More Related Questions