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Created November 8, 2022 21:24
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test-scores.md

Suppose there are $n$ questions on the test. Each can be answered correctly for 1 point or incorrectly for 0 point. Student $i$ has probability $\pi_i$ of answering each question correctly. (This can be generalized for asymmetric test questions.)

The expected number of correct answers is $n\pi_i$.

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