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Each day after an item is lost the probability of finding th

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Manager
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Joined: 27 Jul 2010
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Re: Probability: Tricky one [#permalink] New post 01 Feb 2011, 17:03
It is always a relief, to see Bunuel explanation confirming that you are right, after seeing the repugnant red collor after pushing the answer button.
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Re: Probability: Tricky one [#permalink] New post 02 Feb 2011, 11:07
Ok. So this problem has been officially laid to rest :)
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Re: Probability: Tricky one [#permalink] New post 03 Feb 2011, 01:23
144144 wrote:
so no answer for this one?
can someone give a similar question so i can c if i know how to solve it?

thanks.


The official answer is 1/2, but all members, including me, are getting the answer as 1/8. I will send an email to Bell Curves to see how they justify their explanation. So I guess we'll have to wait till then.

This question is more like fractions/ percentages than probability really. To see similar problems, you can check out problems on successive change in percentages type questions. A similar but not exactly same example:

Q: The population of a town increased by 10% in 2000 and by another 10% in 2001. What is the total percentage change in the population?

There are plenty such problems in this forum as well as prep books such as OG and Kaplan.
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Re: PS_May 13g [#permalink] New post 13 May 2013, 04:31
Expert's post
Prep2014 wrote:
Each day after an item is lost the probability of finding that item is halved. If 3 days after a certain item is lost the probability 1/64, what was the initial probability of finding the item?
a)1/32
b)1/8
c)1/4
d)1/2
e)1


Merging similar topics.
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Re: PS_May 13g   [#permalink] 13 May 2013, 04:31
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