((1 + 40) x 20)/40 ie 20.5
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The sum of the first 40 whole numbers is 780.
11
The average of a series of numbers is their sum divided by however many numbers there are: in this case you would calculate: (16 + 40) / 2 =56 / 2 =28 Therefore the average of 16 and 40 is 28.
6 + 10 + 8 + 7 + 9= 40----------you have 5 integers, so......40/5= 8=====the arithmetic average, or the mean of these numbers
Let the two numbers be x and y. Let suppose that the average of two numbers is 20. Then,x + y = 40 and 40/GCF = 5, where GCF = 40/5 = 8Since LCM is 48 and GCF is 8, the numbers are 16 and 24, whose average is 20 is true.