Single-stage experiments

Question

#1 Andrew has flipped a coin 50 times and tallied 15 heads and 35 tails. He asks you why he is not getting 25 heads and 25 tails because you said the probability of getting heads is ½. How would you respond?

Answer 1

When we say that a probability is 1/2, we do NOT mean that every time we flip a coin twice, we will get one head and one tail. What it does mean is that if we continue flipping the coin infinitely many times, the ratio of the number of heads to the number of tails will converge to 1:1. This assumes the coin is fair, of course.