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

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Current Student
Status: Up again.
Joined: 31 Oct 2010
Posts: 534
Concentration: Strategy, Operations
GMAT 1: 710 Q48 V40
GMAT 2: 740 Q49 V42
Followers: 22

Kudos [?]: 463 [0], given: 75

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02 Feb 2011, 12:07
Ok. So this problem has been officially laid to rest
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My GMAT debrief: http://gmatclub.com/forum/from-620-to-710-my-gmat-journey-114437.html

Current Student
Status: Up again.
Joined: 31 Oct 2010
Posts: 534
Concentration: Strategy, Operations
GMAT 1: 710 Q48 V40
GMAT 2: 740 Q49 V42
Followers: 22

Kudos [?]: 463 [0], given: 75

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03 Feb 2011, 02:23
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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Intern
Joined: 13 May 2013
Posts: 4
Followers: 1

Kudos [?]: 2 [1] , given: 3

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13 May 2013, 05:26
1
KUDOS
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
Math Expert
Joined: 02 Sep 2009
Posts: 38894
Followers: 7737

Kudos [?]: 106177 [0], given: 11608

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13 May 2013, 05:31
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, 05:31

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