The following probabilities for grades in management science have been determined based on past records: Grade Probability A .10 B .30 C .40 D .10 F .10 1.00 The grades are assigned on a 4.0 scale, where an A is a 4.0, a B a 3.0, and so on. Determine the expected grade and variance for the course.

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Chapter1: Combinatorial Analysis
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The following probabilities for grades in management science have been determined based on
past records:
Grade Probability
A .10
B .30
C .40
D .10
F .10
1.00
The grades are assigned on a 4.0 scale, where an A is a 4.0, a B a 3.0, and so on. Determine the
expected grade and variance for the course.

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