Answer:
Efficient but not effective
Step-by-step explanation:
Efficient refers to the situation where we obtain good value with minimal effort. Effective refers to the situation where our actions actually provide the best possible result for us.
From Rick's case, we know that he wants minimum amount of time studying while still getting good grades (this means that he aims for efficiency). But as it turn out, the score that he got is not the best possible result for him (this means that it is not effective)