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Question:

Caitlyn was grading her students' exams. She had seven students who scored a 93, nine students who scored a 96, and three students who scored a 70. What was the average exam score in Caitlyn's class?

A 90.79
Explaination

To find the average, take the sum of the test scores and divide it by the number of students who took the test.
First find the sum of the test scores.
7×93 + 9×96 + 3×70 = 651 + 864 + 210 = 1,725
Next, find the total number of students who took the test.
7 + 9 + 3 = 19
Divide the sum of the test scores by the number of students to find the average.
1,725 \u00F7 19 = ~90.79