Average and Algebra
The average of numbers is . One of the numbers is . After removing the number , the average becomes . What is value ?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
1 solution
We will solve in the form of algebra and average.
The Average : 80 x n = 80n Average Of The Numbers, Not Including The 100 : 80n-100 Equasion Made : 80n - 100 / n - 1 = 78 Equasion Inferred : 80n - 100 = 78n - 78 2n = 100 - 78 = 22 n = 11