Seven sections of College Algebra take the same course final. Calculate the mean

Question

Seven sections of College Algebra take the same course final. Calculate the mean student score based on the given information.

Section 1 with 12 students had a class average of 74.

Section 2 with 22 students had a class average of 81.

Section 3 with 9 students had a class average of 86.

Section 4 with 27 students had a class average of 68.

Section 5 with 18 students had a class average of 78.

Section 6 with 17 students had a class average of 82.

Section 7 with 14 students had a class average of 79.

Explanation / Answer

Ans: Mean student score=Overall sum of total score of 7 section/total number of students in 7 sections

Where,Total score of each section=class average score* number of students in the class or section

Mean student score=9184/119=77.18

section No. of students Average score Total score 1 12 74 888 2 22 81 1782 3 9 86 774 4 27 68 1836 5 18 78 1404 6 17 82 1394 7 14 79 1106 Total 119 9184 Mean score= 77.18

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