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27 Jan 2005, 14:06
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This is one of the problem from hallelujah1234.
The link is below.
https://www.gmatclub.com/phpbb/viewtopic.php?t=6000
Let me try to rephrase the problem to see whether I understand it correctly.
OK, so the problem was given that the ball which was drawn out was white. And that is "GIVEN". So the word which means "GIVEN" tells that the probability is 100%. Is this correct? "GIVEN" means the person who picked out the ball actually saw it as white and picked that particular one. Right?
Let me know if I understand it correctly at this point.
Second question: What if I change the problem as below which ignore that fact that 2 balls are taken out first, then one was white?
A box contains 10 white and 5 black balls. Someone pulled a white ball out. What is the probability that the person pulls another ball and it is black?
So this problem is similar to the first problem right? Which has the answer 5/14.
Please comment.
Quote:
The link is below.
https://www.gmatclub.com/phpbb/viewtopic.php?t=6000
Let me try to rephrase the problem to see whether I understand it correctly.
OK, so the problem was given that the ball which was drawn out was white. And that is "GIVEN". So the word which means "GIVEN" tells that the probability is 100%. Is this correct? "GIVEN" means the person who picked out the ball actually saw it as white and picked that particular one. Right?
Let me know if I understand it correctly at this point.
Second question: What if I change the problem as below which ignore that fact that 2 balls are taken out first, then one was white?
A box contains 10 white and 5 black balls. Someone pulled a white ball out. What is the probability that the person pulls another ball and it is black?
So this problem is similar to the first problem right? Which has the answer 5/14.
Please comment.
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
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Thank you for understanding, and happy exploring!
27 Jan 2005, 16:25
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since we knw tht the first draw was white left over is 5/14
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
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