The weighted average is -33.
given,(2,8)(-4.-7)and their weighted average is 3:5
Weighted average is a calculation that takes into account the varying degrees of importance of the numbers in a data set. In calculating a weighted average, each number in the data set is multiplied by a predetermined weight before the final calculation is made.
(2,8)x5=10+40
=50
(-4,-7)x3=-12-21
=-33
therefoe, the weighted average is -33.
The average is the sum of all individual observations divided by the number of observations. In contrast, the weighted average is observation multiplied by the weight and added to find a solution.
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