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1.) The grades of a student in his subjects for the1st quarter are 87,88,89,90,89,90,93,89 and 95. Find the arithmetic mean.

Sagot :

Devorahazurviz

Answer:

= 87 + 88 + 89 + 90 + 89 + 90 + 93 + 89 + 95

= 810 / 9

= 90

Explanation:

Add up all the values and divide the sum by the number of values.

For example, if there are a set of “n” numbers, add the numbers together for example: a + b + c + d and so on. Then divide the sum by “N”, which is the number of values in the set.