1. Keynesian Economics Mathematical Problem: Suppose a country's MPC = .80 and a country's average tax rate = .25. Now suppose consumer spending = $ 200 billion, capital spending = $ 150 billion, government spending = $ 100, and there were no imports or exports in this fictional country. Conclusion: In that case, the country's aggregate demand would be US $ 1.125 trillion. _____________________ X (C + I + G +/- International Trade) = Aggregate Demand

1 - MPC X (1 - tax rate) 2. In college, 34.1 percent of students are enrolled in math classes, while 12.8 percent are enrolled in economics classes. In total, 38.7% of the students are enrolled in a math or economics class. If one student from the college is picked at random, calculate the probability that: a) The student is enrolled in a Math and Economics course. b) The student is enrolled in a Math class while being enrolled in an Economics subject. c) The student is enrolled in either a Math or Economics course, but not both. If necessary, round your answers to four decimal places. 3. The following data depicts two people's production capabilities in solving math and economic challenges. A can solve 10 math problems and B can solve 10 math problems if they put their full effort and time into it. A can solve 10 economic difficulties and B can solve 5 economic problems if they commit their entire effort and time to economics. A B A B A B A B A B A B A B A B A B A B A B A B A B A A. Who has the clear upper hand? A. Who has the comparative advantage? B. Who has the comparative disadvantage? A B C. Assume that each person is self-sufficient and that they spend half of their time and resources to math and the other half to economics. The end result is as follows: A A B B A B B There is no trading if you are alone. Math Economics (Math Economics) (Math Economics) (Math Economics) (Ma Assume they specialize based on their comparative advantage. How much math and economics will they be able to create as a team? What are the advantages of trade? 4. 100 students are enrolled in an accounting course, 150 in an economics course, and 200 in an English composition course for every 250 students enrolled in a university math course. In a math class with economics, 25 students do not take accounting or English, 75 take both, and 25 take English but not accounting. How many pupils are enrolled in accounting and economics but not English in a math class? How many students are enrolled in an economics course but not in a math, accounting, or English course?