To calculate an average, add all the numbers in the data set and divide by the number of numbers.

Example: The sum of these numbers is 10,547; 10,547 / 8 = 1318.375. You could round this off for an average or mean of 1,318.

Problem 1: If these were your grades on exams, what would be your exam average?

84, 73, 93, 95, 79, 86