Four students take an exam. Three of their scores are 70, 80, and 90. If the average of their four scores is 70 , then what is the remaining score?
Answer Choices
A. 40
B. 50
C. 55
D. 60
E. 70
Four students take an exam. Three of their scores are 70, 80, and 90. If the average of their four scores is 70 , then what is the remaining score?
Answer Choices
A. 40
B. 50
C. 55
D. 60
E. 70