Solve correctly. I will rate accordingly.   An urn contains four yellow balls and two green balls. Find the probability of getting a yellow ball if   (a) you choose a ball at random from the urn, and   (b) you take two balls at random from the urn, throw them away and then choose a third ball at random.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Solve correctly. I will rate accordingly.

 

An urn contains four yellow balls and two green balls. Find the probability of getting a yellow ball if

 

(a) you choose a ball at random from the urn, and

 

(b) you take two balls at random from the urn, throw them away and then choose a third ball at random.

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