Xiao Ming scored 92 points in the first monthly exam, 88 points in the third monthly exam and 90 points in the third monthly exam. What was the average score of his previous three monthly exams? Points;

(92+88+90) ÷ 3 = 90 To make the average score of the four exams reach 92 points, you must get it for the fourth time? Minute 92 x 4-90 x 3 = 98