Suppose that the expected exam scores from studying economics for 0, 1, 2, or 3 hours are 65, 80, 90, and 95 points, respectively, while the expected exam scores for studying 0, 1, 2, or 3 hours of accounting are 50, 65, 70, and 70 points, respectively.With 3 total hours of study time, the marginal benefit in terms of your economics score of spending the first hour studying economics is _______ points.
A) 5
B) 10
C) 15
D) 20

Question

Quizplus · Accepted Answer

The marginal benefit of studying economics for the first hour can be calculated by taking the difference between the expected exam score from studying economics for 1 hour (i.e. 80 points) and the expected exam score from studying economics for 0 hours (i.e. 65 points). Thus, the marginal benefit of studying economics for the first hour is 80 - 65 = 15 points.

Suppose That the Expected Exam Scores from Studying Economics for 0