Four coins are tossed several times. which of the following represents the outcome on a coin that may not be fair?
--1st coin is tossed 50 times and gives 24 heads and 26 tails.
--2nd coin is tossed 250 times so that p(heads) = 0.25.
--3rd coin is tossed 16 times and gives p(tails) = 9/16
--4th coin is tossed 25,000 times and gives 12,505 heads.