Probabilty Riddles

[kyro]

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I always found it easier to think of that question using 100 doors-

You pick one-
The host opens 98 empty ones-
Should you keep the one you originaly picked or the remaining unknown door?

Much easier to grasp the concept that way.

regards,
Tim

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A guy and I were trying to explain this concept to a friend of mine. We used your approach, and said "pretend there are 100 doors, he's going to show you 98 empty doors," etc. Well my friend was still confused, and after a few more agonizing explanation attempts the other guys said, "OK, well then imagine that you have a million doors..."

It was hilarious at the time.

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Sickeningly enough, this happened to me when my teacher explained the problem. He did the 100 door example and I was still adamant he was wrong. About 5 minutes later, it finally hit me, and I'm usually pretty quick with this kinda stuff.