(Answered) Suppose a student either has 1 2 or 3 finals to take each

Economics

Suppose a student either has 1, 2, or 3 finals to take each with a respective probability of 0.16, 0.48, and 0.36.

1) What is a student's expected number of finals?

Suppose a student either has 1, 2, or 3 finals to take each with a respective probability of 0.17, 0.46, and 0.37.

2) What is the standard deviation for number of finals?

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