Clue to Puzzle #57: Making a Fair Decision With a Biased Coin
57. How can you use a biased coin to make an unbiased decision?
That is to say the coin does not give heads or tales with equal probability. How can you ensure that decisions made with the coin do have a 50:50 chance?
That is to say the coin does not give heads or tales with equal probability. How can you ensure that decisions made with the coin do have a 50:50 chance?
My suggestion is that you think about what happens if you toss the coin twice. Work out the possible combinations of outcomes, and their probabilities.Anything you notice that could be useful? For an extra clue, if you're sure, click here
Where next?
Questions Answer
© Nigel Coldwell 2004 - – The questions on this site may be reproduced without further permission, I do not claim copyright over them. The answers are mine and may not be reproduced without my expressed prior consent. Please inquire using the link at the top of the page. Secure version of this page.
PayPal
I always think it's arrogant to add a donate button, but it has been requested. If I help you get a job though, you could buy me a pint! - nigel
