Consider the following example: if one section of a course has three students, alia, barney and carmen. Let alia's scores on the four assignments in the course be 100, 90, 80 and 95, for an average of 91.25. Let barney's scores on the four assignments in the course be 83, 93, 90 and 95, for an average of 90.25. Let carmen's scores on the four assignments in the course be 100, 70, 85, and 93, for an average of 87.00. The average score for this section would be (91.25 + 90.25 + 87.00)/3 = 89.50, rounded to two decimal places.