2 or 3 the puzzle.

2 or 3 the puzzle.

Posers and Puzzles

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c
Copyright ©2001-2006

Eastbourne

Joined
20 Sep 04
Moves
16434
02 Feb 06
1 edit

RHP CHOSE Cup 'A' .

STAGE 2 OF Puzzle

I now raise cup 'B' to show the ball isnt underneath that cup.(bear in mind I actuall know which cup has the ball)


You now have a second chance to choose where tha ball is hidded.

You are allowed to change your mind.But you dont have to.

Do you stick with cup 'A' or switch to cup 'C' ?

Stay with 'A' or switch to 'C'.

P
Bananarama

False berry

Joined
14 Feb 04
Moves
28719
02 Feb 06

Originally posted by celticcountry
RHP CHOSE Cup 'A' .

STAGE 2 OF Puzzle

I now raise cup 'B' to show the ball isnt underneath that cup.(bear in mind I actuall know which cup has the ball)


You now have a second chance to choose where tha ball is hidded.

You are allowed to change your mind.But you dont have to.

Do you stick with cup 'A' or switch to cup 'C' ?

Stay with 'A' or switch to 'C'.
Switch to C. The odds are 2/3 that the ball is under cup C, and only 1/3 that you picked right in the first place and it's under cup A.

Let's make a deal!

Secret RHP coder

on the payroll

Joined
26 Nov 04
Moves
155080
02 Feb 06

http://mathforum.org/dr.math/faq/faq.monty.hall.html

c
Copyright ©2001-2006

Eastbourne

Joined
20 Sep 04
Moves
16434
02 Feb 06

Originally posted by BigDoggProblem
http://mathforum.org/dr.math/faq/faq.monty.hall.html
lol


ok.

Game over.

f

Joined
01 May 05
Moves
390
02 Feb 06

Originally posted by celticcountry
lol


ok.

Game over.
Everyone knew it was a Monty Hall. Why didn1t you post the whole thing or didn't post at all?

Like I said, you must assume that:
a)It is part of the rules that you must lift one cup.
b)You won't lift the cup with the ball.

c
Copyright ©2001-2006

Eastbourne

Joined
20 Sep 04
Moves
16434
03 Feb 06

Originally posted by fetofs
Everyone knew it was a Monty Hall. Why didn1t you post the whole thing or didn't post at all?

Like I said, you must assume that:
a)It is part of the rules that you must lift one cup.
b)You won't lift the cup with the ball.
i didnt realize it was a well know one.

T
Kupikupopo!

Out of my mind

Joined
25 Oct 02
Moves
20443
05 Feb 06

Originally posted by celticcountry
i didnt realize it was a well know one.
It kept mathematicians busy for several years...

B
Non-Subscriber

RHP IQ

Joined
17 Mar 05
Moves
1345
05 Feb 06

Originally posted by TheMaster37
It kept mathematicians busy for several years...
Half of them got it wrong.

s
Fast and Curious

slatington, pa, usa

Joined
28 Dec 04
Moves
53223
05 Feb 06

Originally posted by Bowmann
Half of them got it wrong.
Here is a Java animation of the problem, I tried it, if you switch
you really do win more often.
http://people.hofstra.edu/staff/steven_r_costenoble/MontyHall/MontyHallSim.html