Posted by **the man** on Sunday, May 20, 2012 at 2:15am.

One bag contains 4 white balls and 6 black balls. Another bag contains 8 white balls and 2 black balls. A coin tossed to select a bad, then a ball is randomly selected from that bag.

Suppose white ball was drawn. What is the probability that it came from the first bag?

- MATH 12 HELP! -
**Reiny**, Sunday, May 20, 2012 at 8:45am
Since a coin toss is used to select either bag1 or bag2

the prob that bag1 is choses is 1/2

prob that a white ball is choses from bag1 = 4/10 = 2/5

so prob of your 'event' = (1/2)(2/5) = 1/5

- MATH 12 HELP! -
**the man**, Sunday, May 20, 2012 at 6:37pm
but the answer in my book says 1/3... Maybe its wrong?

- MATH 12 HELP! -
**DOMICA**, Friday, September 26, 2014 at 8:01am
PR=BROWN

## Answer This Question

## Related Questions

- ******MATH 12******* - How about this. One bad contains 4 white balls and 6 ...
- Maths - Bag A contains 2 white, 1 black and 3 red balls, Bag B contains 3 white...
- st.joseph's high school - two boxes are selected randomly.the first box contains...
- Math - A bag contains 5 red balls, 4 white balls, and 3 black balls. Two balls ...
- FINITE - selection of colored balls from two bags. Assume that each bag contains...
- statistics - one bag contains 4 white balls,2 black balls.another bag contains 3...
- statistics - Assume that each bag contains 6 balls. Bag a contains 3 red and 3 ...
- Math - A bag contains three black balls, four white balls and five red balls. ...
- Math (Probability) - An urn A contains 6 white balls and 7 black balls. And urn ...
- Math (Probability) - An urn A contains 6 white balls and 7 black balls. And urn ...

More Related Questions