Answer:
Grade Exams Test questions
Jill 20 40
Bryan 30 20
Opportunity cost of helping grade exams,
Jill- 40/20= 2
Bryan- 20/30=2/3
Opportunity cost of heling in test questions,
Jill- 20/40=1/2
Bryan- 30/20= 3/2
Jill has a lower opportunity cost of helping in test questions. Thus it has a comparative advantage in test questions. While, Bryan has a lower opportunity cost in grade exams. Thus is has a comparative advantage in grade exams.
Jill will therefore produce, 40 Test questions and Bryan will produce 30 grade exams.