The Table Below Is the Probability Table for a Random

question 12

Short Answer

The table below is the probability table for a random variable X. Find E(X), Var(X), and the standard deviation of X. $$\begin{array} { l | l l l l l } \text { Outcome } & 40 & 50 & 60 & 70 & 80 \\\hline \text { Probability } & 0.3 & 0.15 & 0.15 & 0.2 & 0.2\end{array}$$ Enter just three real numbers all rounded off to two decimal places: a, b, c representing the three quantities in the order requested above, separated by commas (no labels).

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