or heads then tails, or tails then heads. the chance of its landing heads both times is one out of four. or to put it another way, if four people each flipped a dime two times. one of them could be expected by the laws of chance to come up with two heads in a row.
now, i only say that to introduce you to this whole idea of probability. the chance of getting heads three times out of three flips is, of course, greatly reduced. if eight people each flipped a dime three times, one of them could be expected to come up with three heads. one person in 16 