# MATH(STATISTICS)

posted by .

Urn A contains R red balls and W white balls, urn B contains r red balls and w white balls.

a.If an urn is selected at random and a ball drawn, what is the probability that the ball is red?

b.If a ball is drawn from urn A and put into urn B, and then a ball is drawn from urn B, what is the probability that the second ball is red?

c.If A and B are independent events, then prove that A^C (A raise to C) and B^C (B raise to C) are also independent.

• MATH(STATISTICS) -

a. R/(R+W) + r/(r+w) = ?

It's a start.

## Similar Questions

1. ### Finite Math

An urn contains six red balls and five white balls. A sample of 2 balls is selected at random from the urn. What is the probability that at least one of the balls is red?
2. ### Math (Probability)

An urn A contains 6 white balls and 7 black balls. And urn B contains 8 white balls and 6 black balls. A person draws a ball at random from one of the two urns. It turns out to be black. What is probability that the ball was drawn …
3. ### MATH

Urn A contains six white balls and three black balls. Urn B contains seven white balls and five black balls. A ball is drawn from Urn A and then transferred to Urn B. A ball is then drawn from Urn B. What is the probability that the …
4. ### statistics

An urn contains white and red balls. Four balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all balls drawn from …
5. ### statistics

An urn contains white and red balls. Four balls are randomly drawn from the urn in succession, with replacement. That is, after each draw, the selected ball is returned to the urn. What is the probability that all balls drawn from …
6. ### Pre Algebra Probability

Each of two urns contains green balls and red balls. urn 1 contains 10 green balls and 14 red balls. urn 2 contains 4 green balls and 11 red balls. if a ball is drawn from each urn what is p(red and red)?
7. ### Math help?

I am kind of stuck on this one Each of two urns contains green balls and red balls. Urn I contains 10 green balls and 8 red balls. Urn II contains 3 green balls and 10 red balls. If a ball is drawn from each urn, what is P(red and …
8. ### mathematical statistic

Urn A contains six white balls and three black balls. Urn B contains seven white balls and five black balls. A ball is drawn from Urn A and then transferred to Urn B. A ball is then drawn from Urn B. What is the probability that the …
9. ### STATISTICS

An urn contains 14 white balls and 6 red balls. two balls are to be selected in succession, at random and without replacement what is the probability that i) both balls are white, ii) the first ball in white and the second ball is …
10. ### math

Urn A contains four white balls and seven black balls. Urn B contains six white balls and three black balls. A ball is drawn from Urn A and then transferred to Urn B. A ball is then drawn from Urn B. What is the probability that the …

More Similar Questions