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%pset11 problem7 spring98; from fall 97 pset11 problem8
\begin{problem}


Recall than in the Chinese Appetizer Problem $R$ is number of people that
get the same appetizer after a spin of the Lazy Susan.

\begin{problemparts}

\problempart
Compute the variance of $R$.

\problempart
Show that the upper bound that you get on $\Pr(R \geq N)$ from the strong form
of Chebyshev's inequality is tight.

\end{problemparts}
\end{problem}
