Problem:
The AMC contests will be scored by awarding points for each correct response, points for each incorrect response, and points for each problem left unanswered. After looking over the problems, Sarah has decided to attempt the first and leave the last unanswered. How many of the first problems must she solve correctly in order to score at least points?
Answer Choices:
A.
B.
C.
D.
E.
Solution:
Sarah will receive points for the three questions she leaves unanswered, so she must earn at least points on the first problems. Because
she must solve at least of the first problems correctly. This would give her a score of .
The problems on this page are the property of the MAA's American Mathematics Competitions