You have a giant bag of coins (think infinitely large). Most of the coins in the bag are fair, but 10% of them are biased: they come up heads 90% of the time when you flip them. You would like to find one of the biased coins, which you can only identify by flipping the coins. You may pick a coin and flip it N times, after which you must hand me a coin that you think is biased. What strategy lets you minimize the chance that you accidentally hand me a fair coin