Question

On an exam for a class with 54 students, the mean score was 77.2 points. The instructor rescored the exam by adding 6 points to the exam score for every student. What was the mean of the scores on the rescored team?

Answer 1

64.8

Explanation:

take 77.2 + 54 = 139.7 then 21.6 x 3 = 64.8

Answer 2

Number of students = 54
Mean score = 77.2


Let "x" represents the score of an individual student then we can write the expected value or the mean value of "x"

If the instructor rescored the exam by adding 6 points to the exam score of every student then the expected value of the new scores or the mean of the new scores can be given.