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\handout{miniquiz10}{Mini-Quiz 10}{\tutdate}

\begin{enumerate}
\item Write your name:

\bigskip

\item %
 % (Rosen, Section 4.5, Problem 43) 
  What is the variance of the number of heads that come up when a fair coin is flipped 10 times?

  
\solution{
\textbf{Solution:}
In Rosen 4.5, Example 22, we saw that the variance of the number of successes in $n$ Bernoulli trails is $npq$. Here $n = 10$ and $p = q = \frac{1}{2}$. Therefore, the variance is $\frac{5}{2}$. 
}

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\end{enumerate}

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