The sample space \(\Omega\) of the event of
getting two heads or two tails
in an experiment involving a sequence of
two flips of a fair coin
is the set
\[\begin{equation*}
\Omega = \{
(\mathrm{H}, \mathrm{H}),
(\mathrm{H}, \mathrm{T}),
(\mathrm{T}, \mathrm{H}),
(\mathrm{T}, \mathrm{T})
\},
\end{equation*}
\]
| where | \(\mathrm{H}\) | is a symbol denoting “heads” |
| \(\mathrm{T}\) | is a symbol denoting “tails”. |