Even if the class had 200 students the winner didn't need to flip 200 in a row. On average, half the students of the class would get Heads in each iteration, wh

Even if the class had 200 students the winner didn't need to flip 200 in a row. On average, half the students of the class would get Heads in each iteration, which means that this experiment would go on only for lg(200) iterations, which is only 7. Flipping 7 Heads in a row is not all that difficult to imagine.