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Mean - JSS3 Mathematics Lesson Note

The mean (average) of a data set is the sum of all values divided by the number of values.

Example:

Consider the data set:

12,8,5,17,10.

Calculate the mean:

Mean= 12+8+5+17+10/5

= 52/5

=10.4

So, the mean of this data set is 10.4.

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