Dan
When you choose the first time: you have a 33% chance of getting the car whichever door you choose. But it doesn't matter, because Monty changes the test and invites you to try again.
When you choose the second time: you have a 50% chance of getting the car whichever door you choose.
Only the 50% matters. Your previous choice has no impact on this whatsoever. One door has a car and one a goat no matter what you did the first time.
Regards
JR
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
