Expected Value Calculator

Calculate the expected value (weighted average) of random outcomes.

Outcomes & Probabilities

⚠️ Probabilities should sum to 1 (currently 0)

= 10

= 0

= -8

Total Probability:0

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Expected Value

+0

Average outcome over many trials

E[X]

Variance

Std Dev

Interpretation

This is a fair gamble. On average, you break even over the long run.

Documentation

Expected Value

Expected value is the sum of each outcome multiplied by its probability. It represents the long-run average result.

E[X]

Variance

Frequently Asked Questions