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#1 [Permalink] Posted on 22nd February 2011 09:45
Assalamu Alaykum

If I have a coin each in both hands and show you one of the coins is a head, what are the chances that when I show you the other hand it will also be a head. (clue: do not jump to the obvious conclusion)

Question edited. Original question was wrong. Silly me. Try again
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#2 [Permalink] Posted on 22nd February 2011 10:31
Quote:
(clue: do not jump to the obvious conclusion)
so it's not 50% then
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#3 [Permalink] Posted on 22nd February 2011 11:03
Nope. It might help if you write out all the possibilities
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#4 [Permalink] Posted on 22nd February 2011 11:48
Is it 25%
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#5 [Permalink] Posted on 22nd February 2011 11:58
definitely not 100% as its in the other hand and therefore could be heads or tails and 50% was incorrect answer, so...

could the answer be, "Allah knows best"?!!
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#6 [Permalink] Posted on 22nd February 2011 12:07
no chance? it'll still be a hand
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#7 [Permalink] Posted on 22nd February 2011 12:23
maybe the person has only 1 hand
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#8 [Permalink] Posted on 22nd February 2011 13:54
He's updated the questions, changed from "tail" to "head" at the end.

In which case I stick by the same answer, "no chance"
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#9 [Permalink] Posted on 22nd February 2011 13:59
i give up
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#10 [Permalink] Posted on 22nd February 2011 14:14

My working out: 

TT

HT

HH

TH

hence i got 25% but now upon reading the question again I also think the answer has to be 50% since the events are independant of each other.

The first has event has already occured so cannot hold a value. But who am i to say.I hate statistics, i much prefer algebra or calculus. 

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#11 [Permalink] Posted on 22nd February 2011 14:26
I also give up.
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#12 [Permalink] Posted on 22nd February 2011 15:31
A hand was not specified (i.e. right or left) & therefore according to Muslimah101's list the chances are one in three.
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Tadees
#13 [Permalink] Posted on 22nd February 2011 15:36
33.333333333333333333333333333333%
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#14 [Permalink] Posted on 22nd February 2011 15:36
33.333333333333333333333333333333%
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#15 [Permalink] Posted on 22nd February 2011 15:48

"Tadees" wrote:
A hand was not specified (i.e. right or left) & therefore according to Muslimah101's list the chances are one in three.

So just to get this clear, I should have included the possibilties 'showing hand' or 'not showing hand'??

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