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Its simple math. I have seen 21 but I've known the answer to this question since around 5th grade.
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thats what i get for not watching tv :yikes:
right you are UnFan want another one? |
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Can you tell me where I'm going wrong please |
You have one post.
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that doesn't make me any less of a person
Will you help me to understand? |
by switching you double the probability of finding the car voucher from 1/3 to 2/3. Switching is only not advantageous if you initially choose the 'right' box, which happens with probability 1/3.
With probability 1/3, you initially choose one of two 'wrong' boxes; when the other 'wrong' box is opened, switching yields the 'right' box with more certainty. The total probability of winning when switching is thus 2/3. |
Ok, when you know nothing about the situation each box has a 1/3 chance of containing what you want.
So, to start, it looks like this: 1/3, 1/3, 1/3 then you pick a box, so now you have 1/3 chance of having it right, 2/3 that it's one of the other boxes. when you reveal what's inside of one of the other boxes, there's still a 2/3 chance that you made the wrong decision, but now that entire 2/3 rests on the box that hasn't been eliminated, since you know it can't be the other one. so now your odds are 1/3 that you have the right box, and 2/3 that it's the other one. so you should switch. |
/redundancy
that's not really a paradox anyway, here's a fun paradox: consider a set of all sets which do not contain themselves as a member. would this set contain itself? or the next statement is true: the previous statement is false |
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it was a paradoxical puzzle are we happy now? :rofl: |
If this sentence is true then Santa Clause is real.
THAT's a paradox. |
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