If it not land on the edge then there are heads and tales and that is two ways each toss can happen. So for 20 toss of the coin it is 2^20 different ways. That is 1,048,576 different ways.
It really not matter if it land on the ground or not as long as it is heads or tails.
How many do you think?
When toss a coin 20 times ti FALLS to the ground 20 times!!!!!!!!
If you meant to say "what's the probability of tossing a coin 20 and getting 10 heads or 10 tails"
In that case the probability is 50/50. Or equal chance of getting a head or a tail.
If it not land on the edge then there are heads and tales and that is two ways each toss can happen. So for 20 toss of the coin it is 2^20 different ways. That is 1,048,576 different ways.
It really not matter if it land on the ground or not as long as it is heads or tails.