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cat - the previous one wasn't working for some reason.
[[category:mathematics]]
The '''average''' is the sum of a group of numbers divided by the number of values in the group. For example, the average of 3, 5, and 7 is <math>(3+5+7) \div 3=15 \div 3=5</math>.
The '''average''' is the sum of a group of numbers divided by the number of values in the group. For example, the average of 3, 5, and 7 is <math>(3+5+7) \div 3=15 \div 3=5</math>.
:(1·2.00 + 1·2.20 + 10·2.40 + 1·2.20) / (1 + 1 + 10 + 1) = 2.34
:(1·2.00 + 1·2.20 + 10·2.40 + 1·2.20) / (1 + 1 + 10 + 1) = 2.34