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The following probabilities for grades in management science have been determined based on past records: Grade Probability A 0.1 B 0.3 C 0.4 D 0.1

The following probabilities for grades in management science have been determined based on past records:

Grade Probability

A 0.1

B 0.3

C 0.4

D 0.1

F 0.1

1.00

The grades are assigned on a 4.0 scale, where an A is a 4.0, a B a3.0, and so on. Determine the expected grade and variance for the course.

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