Question

A class of 31 students average 82 on a recent exam. Two students were absent and took the exam the next day. The two students average 88 on their exam. What was the average for the entire class, including the two students who took the test one day later?

Answer 1

Find the total points for each group:

31 students averaged 82, so the total points were 31 x 82 = 2542

2 students averaged 88, so the total points were 2 x 88 = 176

Now add the total points and divide by 33 students (31 +2):

2542 + 176 = 2718

2718 / 33 = 82.36

The average is 82.36 ( Round as needed).

Answer 2

31 students averaged 82, sum was 31 x 82 = 2542

2 students had an average of 88, sum is 2 x 88 = 176

2542 + 176 = 2718 (total points)

2718 / 33 = 82.36--> average

The average is 82.36