Tuesday

March 3, 2015

March 3, 2015

Posted by **Anonymous** on Tuesday, February 19, 2013 at 6:04am.

- maths -
**Reiny**, Tuesday, February 19, 2013 at 10:53amprob(white) = 4/10 = 2/5, prob(red) = 6/10 = 3/5

no white balls --- (3/5)^4 = 81/625

one white ball -- C(4,1) (2/5) (3/5)^3 = 216/625

two white balls -- C(4,2) (2/5)^2 (3/5)^2 = 216/625

three white balls -- C(4,3) (2/5)^3 (3/5) = 96/625

four white balls -- (2/5)^4 = 16/625

notice that the sum of these is 1 , as it should be

**Answer this Question**

**Related Questions**

statistics - An urn contains white and red balls. Four balls are randomly drawn ...

statistics - An urn contains white and red balls. Four balls are randomly drawn ...

statistics - An urn contains 10 balls of which 6 are white, 3 are red and 1 is ...

statistics - An urn contains 10 balls of which 6 are white, 3 are red and 1 is ...

MATH(STATISTICS) - Urn A contains R red balls and W white balls, urn B contains ...

Strayer University - An urn contains white balls and red balls. If Juan chooses ...

Math-Probability - An urn contains four red balls and three white balls. A ...

MATH - Urn A contains six white balls and three black balls. Urn B contains ...

Finite Math-Probability - Suppose we have an urn with 10 white balls and 6 red ...

Math (Probability) - An urn A contains 6 white balls and 7 black balls. And urn ...