試題詳解

3. Currently you work for 40 hours per week at the wage rate of $20 an hour. Your free hours are defined as the number of hours not spent in work per week, which in this case is 24 hours × 7 days − 40 hours = 128 hours per week. Suppose now that your wage rate has increased by 25%. If you are happy to keep your total weekly income constant, then:
(A) Your total number of working hours per week will fall by 25%.
(B) Your total number of working hours per week will be 30 hours.
(C) Your total number of free hours per week will increase by 25%.
(D) Your total number of free hours per week will increase by 6.25%