The reason for allocating the hours of study to different courses by the student to maximize his or her grades out of the following reasons:
The grade in each course is the same.
The marginal product of a study hour in each course is zero.
The marginal product of a study hour in each course is equal, although not necessarily equal to zero.
The average product of an hour's study in each course is equal.
The number of hours spent in study for each course is equal.
If the number of hours for study is fixed and the relationship between hours of study and the final grade for each course is certain. The grade average is given on a scale of
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