Question

3. What is the average (arithmetic mean) of all the multiples of ten from 10 to 190 inclusive?

A. 90
B. 95
C. 100
D. 105
E. 110

Answer 1

C. 100

Answer 2

Ok... Um thanks, can you help explain it to me?

Answer 3

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Answer 4

@iGreen

Answer 5

So what you do is that you got 10,20,30,40..190

Answer 6

To calcuate it you pretty much do 190=10+(n-1)10
n=19

Answer 7

s= (19/2)[a+1]
=(19/2)*200/2
=1900

Answer 8

All you got to do is average it next and by doing that you need to divide it by 1900 by 19 to find 100

Answer 9

O ok thank you very much but does arithmetic mean anything special? or is it another word for mean.

Answer 10

yeah thats what it means

Answer 11

O thx

Answer 12

Its simply the mean or the average of the sum of collection of numbers divided by the number of the collection of numbers.