Average
Average is the sum of set of values divided by the number of values.
Average = Sum of quantities / Number of quantities
1 ) If all the given quantities have the same value then the number itself is the average.
2 ) If all the quantities are not same then the average of the given quantities is always greater than the smallest number and always less than the largest number.
3 ) If each of the values are added or multiplied by a given number then their average is also added or multiplied by that number.
4 ) I the average of n1 quantities be x and n2 quantities be y then the average of total n1 and n2 = ( n1.x + n2.y )/ ( n1 + n2 )
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