\problemdata                                                             
        {Temperatures} % latex-friendly label for the prob.
        {random variables, probability} % The topic(s) of the problem content.  
        {?} % Source (if known)                                          
        {S01 Tutorial 13, 5} % Usage (list ones you are aware of). 
        {Tina Wang, S02} % Last revision info (author, date).   
                                                                         
                                                                         
\begin{problem}           
[Make up story here.]  Let the average temperature for each year be randomly a
distributed real variable.  Suppose that these variables are independent and
identically distributed over the the last 100 years (for which we have
records).
What is the chance that the 5 record high temperatures have been
recorded in the last 10 years? Do we need any additional assumptions?

\solution{
\[
\frac{\binom{10}{5}}{\binom{100}{5}}
\]
}
\end{problem}
                                 