In three tosses there can be four possible outcomes: three
heads, three tails, two heads and one tail, and one head and two
tails. ^^^That is wrong
A coin is tossed N times. There are 2 possibilities when you toss a coin: heads and tails.
So the formula is 2^N (thats to the N power)
A coin tossed 3 times has 2^3=8 possible outcomes:
head head head
head head tail
head tail head
tail head head
tail tail head
head tail tail
tail head tail
tail tail tail
There they are!