What is the new average?

In a class of 24 students, 23 of them took an exam in class and 1 student took a make-up exam the following day. The professor graded the first batch of 23 exams and found an average score of 84 points with a standard deviation of 6.4 points. The student who took the make-up the following day scored 65 points on the exam.
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1 Answer

The total score of 23 students=(23) (84)= 1932

New total of 24 students=1932+65=    1997

New average=1997/24=83.21
by Level 8 User (32.3k points)

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