Suppose this semester you receive a grade of A in your chemistry class and a grade of C in your economics class.

A friend comments: “It’s clear you didn’t learn the material in your economics class but you didn’t rationally divide up your study time. If you had, you could have earned a B in both chemistry and economics.” Is your friend correct? In your answer, be sure to explain what would need to be true for your friend to be correct and what would need to be true for your friend to be incorrect.