Given a biased coin, how do you create an unbiased toss?

Flip the coin twice and consider the outcome as follows.

• Flip the coin twice and consider the outcome as follows:

• - If both flips are heads or both are tails, discard and flip again.

• - If the first flip ...read more

Toss the coin twice.If the results match, start over, forgetting both results.If the results differ, use the first result, forgetting the second.