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Master | Next Rank: 500 Posts
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by magical cook » Tue Sep 25, 2007 6:16 pm
I'm sorry the figure is corrupt but it shows as it is on my paper.... but hopefully someone could still help me...
You do not have the required permissions to view the files attached to this post.
Last edited by magical cook on Wed Sep 26, 2007 7:35 am, edited 1 time in total.
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by kajcha » Tue Sep 25, 2007 6:27 pm
IMO 12

Suppose there are x cards in the stack.

Probability of both cards to be blue = (9/x)*(8/(x-1)) = 6/11

Solving the above eq

x(x-1)=12*11

x=12 ANS
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by magical cook » Wed Sep 26, 2007 7:36 am
Kajcha, sorry...I attached a wrong file first (yes OA is correct) but can you also take a look at the above file as well? Thanks for your help..
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by kajcha » Wed Sep 26, 2007 7:45 am
The attachment is not very clear. I am having difficulty to figure the pic out. Is it possible for you to draw a pic using some other s/w and attach that?
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by magical cook » Wed Sep 26, 2007 8:00 am
Actually, original attachment looks as it is on my paper.... :cry:
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