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Subject: "infinite probability"     Previous Topic | Next Topic
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Conferences The CTK Exchange College math Topic #730
Reading Topic #730
girl_honey
guest
May-22-10, 06:48 PM (EST)
 
"infinite probability"
 
   hi i am having trouble with the following question, wondering if someone can help me, thanks in advance

Q. if i have a very large number of pool balls in a bag in the ratio of 3 red to 2 yellow, what is the probability of drawing exactly 2 red and 1 yellow ball from the bag? the number of balls may be considered infinite

thank you.
Oyinkan


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alexb
Charter Member
2506 posts
May-22-10, 06:54 PM (EST)
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1. "RE: infinite probability"
In response to message #0
 
   Probability of drawing a red ball is 3/5. Do you know why? What is the probability of drawing a yellow ball?

There are three ways to retrieve 2 red and 1 yellow ball. In order of the balls appearance out of the bag:

r-r-y, r-y-r, y-r-r

Probability you are looking for is the sum of the probabilitles of these three events.

The probability of each of these is the product of probabilities of drawing a ball of a given color.


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girl_honey
guest
May-22-10, 10:12 PM (EST)
 
2. "RE: infinite probability"
In response to message #1
 
   thanks for the help. it was the 'infinite' part that confused me

.Oyinkan.


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