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Author Topic: Moving on to a Maths Puzzle  (Read 3625 times)
TightEnd
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« on: January 09, 2007, 02:24:43 PM »
(Solution will be provided by Dr Richard Prew, B.A( hons) , Phd, ACIS, but only after you've had a good go!).

A standard pack of cards is thrown into the air in such a way that each card, independently, is equally likely to land face up or face down.  The total value of the cards which landed face up is then calculated.  (Card values are assigned as follows: Ace=1, 2=2, ... , 10=10, Jack=11, Queen=12, King=13.  There are no jokers.)

What is the probability that the total value is divisible by 13?


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ACE2M
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« Reply #1 on: January 09, 2007, 02:29:34 PM »
1
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boldie
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« Reply #2 on: January 09, 2007, 02:30:05 PM »
lol..you don't make it easy do you? PM sent...don't want to ruin it for everyone. less then 1 though.
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ACE2M
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« Reply #3 on: January 09, 2007, 02:31:58 PM »
Quote from: boldie on January 09, 2007, 02:30:05 PM
lol..you don't make it easy do you? PM sent...don't want to ruin it for everyone. less then 1 though.

i know, just taking an early punt. will work out correct answer.
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Claw75
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« Reply #4 on: January 09, 2007, 02:32:59 PM »
  I'll leave this one to Wardonkey......
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Royal Flush
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« Reply #5 on: January 09, 2007, 02:33:18 PM »
Quote from: boldie on January 09, 2007, 02:30:05 PM
lol..you don't make it easy do you? PM sent...don't want to ruin it for everyone. less then 1 though.

lol you worked it out in 6 minutes......hmmmmm
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boldie
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« Reply #6 on: January 09, 2007, 02:37:34 PM »
Quote from: Royal Flush on January 09, 2007, 02:33:18 PM
Quote from: boldie on January 09, 2007, 02:30:05 PM
lol..you don't make it easy do you? PM sent...don't want to ruin it for everyone. less then 1 though.

lol you worked it out in 6 minutes......hmmmmm

I'm a genius flushy didn't ya know?
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thetank
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« Reply #7 on: January 09, 2007, 02:40:15 PM »
He worked it out in less than one minute...fold  Cheesy
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Wardonkey
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« Reply #8 on: January 09, 2007, 02:42:58 PM »
Quote from: Claw75 on January 09, 2007, 02:32:59 PM
I'll leave this one to Wardonkey......

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totalise
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« Reply #9 on: January 09, 2007, 02:44:04 PM »
Tightend, the probability of this happening is 50%, I will let others elaborate.
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TightEnd
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« Reply #10 on: January 09, 2007, 02:46:03 PM »
Quote from: totalise on January 09, 2007, 02:44:04 PM
Tightend, the probability of this happening is 50%, I will let others elaborate.



fascinating. it's somewhat less than 50% though.
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ACE2M
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« Reply #11 on: January 09, 2007, 02:48:35 PM »
0.078125 or 5/64.

that could well be wrong.

i'm at work here.
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Royal Flush
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« Reply #12 on: January 09, 2007, 02:50:48 PM »
It could be google!
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Moskvich
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« Reply #13 on: January 09, 2007, 02:52:12 PM »
In the absence of any brain power, I'd have to go for 1 in 13. But I suspect that may be too easy.
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booder
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« Reply #14 on: January 09, 2007, 02:55:22 PM »
eleventy
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im not speculating, either, but id have been pretty peeved if i missed the thread and i ended up getting clipped, kindly accepting a lift home.

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