- #1

torquerotates

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## Homework Statement

A box contains 4 red balls and 6 white balls. A sample size of 3 is drawn without replacement from the box. What is the probability of obtaining 1 red ball and 2 white balls given that at least 2 of the balls in the sample are white?

## Homework Equations

## The Attempt at a Solution

Well if I got at least two white balls that means that I either have 2W or 3W. If I have 2W, then I can chose among the remaining 4W and 4R. Hence the probability is 1/2 given that i already otained 2W. If i have 3W, the probabilty is 0 given that i already obtained 2W. Hence my answer is 1/2. BUT... I am wrong. the answer is 3/4. I am not sure where i went wrong here.