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

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

yolo_king · Answer

C. 100

anonymous · Answer

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

anonymous · Answer

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anonymous · Answer

@iGreen

yolo_king · Answer

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

yolo_king · Answer

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

yolo_king · Answer

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

yolo_king · Answer

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

anonymous · Answer

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

anonymous · Answer

yeah thats what it means

anonymous · Answer

O thx

yolo_king · Answer

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