Jones and Smith are teaching assistants. Jones can grade 20 ...

[ssal]

Jones and Smith are teaching assistants. Jones can grade 20 essays or 50 problem sets a day, while Smith can grade 20 essays or 10 problem sets a day. Therefore
 
  A) Smith sacrifices 2 graded essays for every 2 problem sets she grades.
  B) Smith sacrifices 10 graded essays for every 20 problem sets she grades.
  C) Jones sacrifices 2 graded essays for every 5 problem sets he grades.
  D) Both Smith and Jones have a comparative advantage in grading essays.

Question 2

Which of the following is true?
 
  A) MSB = MB + Marginal external benefit.
  B) MB = Marginal external benefit - MSB.
  C) MB = Marginal external benefit + MSC.
  D) MSB = Marginal external cost - marginal external benefit.
  E) MSB = MB + Marginal external benefit - Marginal external cost.

[maaaaaaaaaa]

Answer to Question 1

C

Answer to Question 2

A

[ssal]

TYSM

[nyrave]

Gracias!