Problem of the Week - Middle School - Dec. 6, 2020 to Dec. 12, 2020

Middle School: 

Question: Mason scores 40 points on his fifth of five quizzes, increasing his average score to 32 points. What was Mason's average score after the first four quizzes? 

Answer: 30 points. 

Solution:  If Mason’s average point score over 5 tests was 32 points, then he must have earned 32 × 5 = 160 points in total. Before his last test, he had 160 – 40 = 120 points over 4 tests. So, his average score after 4 tests was 120 ÷ 4 = 30 points.