# 2 or 3 the puzzle.

celticcountry
Posers and Puzzles 02 Feb '06 18:36
1. celticcountry
02 Feb '06 18:361 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'.
2. PBE6
Bananarama
02 Feb '06 18:57
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!
3. BigDoggProblem
Just...the Dogg
02 Feb '06 19:47
http://mathforum.org/dr.math/faq/faq.monty.hall.html
4. celticcountry
02 Feb '06 19:50
Originally posted by BigDoggProblem
http://mathforum.org/dr.math/faq/faq.monty.hall.html
lol

ok.

Game over.
5. 02 Feb '06 23:55
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.
6. celticcountry
03 Feb '06 09:27
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.
7. TheMaster37
Kupikupopo!
05 Feb '06 13:17
Originally posted by celticcountry
i didnt realize it was a well know one.
It kept mathematicians busy for several years...
8. Bowmann
Non-Subscriber
05 Feb '06 14:39
Originally posted by TheMaster37
It kept mathematicians busy for several years...
Half of them got it wrong.
9. sonhouse
Fast and Curious
05 Feb '06 15:31
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