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Timed Test For
Expected value
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Sample Problem
$X$ is a discrete random variable. The table below defines a probability distribution for $X$. **What is the expected value of $X$?** [[☃ numeric-input 1]] $x$ | $P(X = x)$ :-: | :-: |:-: $2$| $0.06$ $3$| $0.42$ $7$| $0.52$
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Duration
30 seconds
60 seconds (1 minute)
120 seconds (2 minutes)
180 seconds (3 minutes)
300 seconds (5 minutes)