If two fair coins are tossed, what is the probability of getting two heads?
There are several possibilities:
Each of these four outcomes is equally probable, so each has a 1 in 4 chance. So the probability of getting two heads is:
Probabilities are usually given as fractions.
(Now, had the question been "What is the probability of getting one head and one tail?" - the answer would be
The probability of getting 2 heads with 2 coins can be broken into 2 steps:
The first coin must show Heads AND
the second coin must show Heads.