MathDB

A multiple choice examination consists of

20

questions. The scoring is

+5

for each correct answer,

-2

for each incorrect answer, and

0

for each unanswered question. John's score on the examination is

48

. What is the maximum number of questions he could have answered correctly?

\text{(A)}\ 9 \qquad \text{(B)}\ 10 \qquad \text{(C)}\ 11 \qquad \text{(D)}\ 12 \qquad \text{(E)}\ 16

Problem Statement