Final answer:
The theoretical probability of getting heads when flipping a coin is always 0.5 per flip, regardless of the number of flips, due to each flip being independent. However, the relative frequency will approach this theoretical probability as the number of flips increases.
Step-by-step explanation:
The theoretical probability of getting two heads when flipping a fair coin does not change with the number of times the coin is flipped. The probability remains constant at 0.5 for each flip. This is because each coin toss is an independent event and one outcome does not affect the other.
However, according to the law of large numbers, if we flip a coin many times, such as 20, 2,000, or 20,000 times, the relative frequency of heads should approach the theoretical probability of 0.5. In other words, the more times the coin is flipped, the closer the experimental results (or the relative frequency) will tend to align with the theoretical probability.