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# There is a 30% chance of rain and 70% chance of shine. If it

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VP
Joined: 30 Jun 2008
Posts: 1007
There is a 30% chance of rain and 70% chance of shine. If it [#permalink]

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28 Sep 2008, 04:23
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There is a 30% chance of rain and 70% chance of shine. If it rains, there is a 50% chance that Bob will cancel his picnic. What is the chance that Bob will have his picnic ?

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VP
Joined: 05 Jul 2008
Posts: 1333
Re: PS: Will Bob have his picnic today ? [#permalink]

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28 Sep 2008, 09:23
amitdgr wrote:
There is a 30% chance of rain and 70% chance of shine. If it rains, there is a 50% chance that Bob will cancel his picnic. What is the chance that Bob will have his picnic ?

the chance that Bob will have his picnic
=

shines and bob has his picnic + rains and bob has his picnic

70/100 X 1 + 30/100 X 50/100 = 85%

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: PS: Will Bob have his picnic today ?   [#permalink] 28 Sep 2008, 09:23
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# There is a 30% chance of rain and 70% chance of shine. If it

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