Determining Discrete Probability Distributions
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The adjacent table represents marks given to a group of 20 students.
Using this data, determine a probability distribution for the number of marks.
\begin{align}
&\begin{array}{|c|c|c|c|c|c|c|}
\hline x & 0 & 1 & 2 & 3 & 4 & 5 \\
\hline \operatorname{Pr}(\mathrm{X}=x) & 0.1 & 0.15 & 0.25 & 0.35 & 0.1 & 0.05 \\
\hline
\end{array}\\
&\operatorname{pr}(X=0)=\frac{2}{20}=0.1\ \text{and continue}\\
&\text{this way to determine the other probabilities.}
\end{align}
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