Unfair Coin Flip

[Paraselene]

So for a clue, the word "simulate" is important. For obvious reasons you can't do this with a single coin flip, we've established that is unfair. The method will involve multiple coin flips, but will produce a final answer of either "heads" or "tails".

How do multiple coin flips produce only one final answer of "heads" or "tails"?
Let's say I do ten coin flips, those ten flips only result in one answer of heads or one answer of tails, or does it result in an added percentage of more; for example, six heads and four tails?