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Re: a , b , c and d are different positive numbers. The average (arithmeti [#permalink]
2
YB114 : yes if you have to find the Mean or Average then you do not need to arrange the terms in ascending or descending. Arranging is done when you have to find things like Median, Mode or Range.

There are special cases when arranging of terms can be helpful for Mean also, example: if the series is in arithmetic progression (i.e. consecutive terms ahve the same common difference)
In that case
➣ Mean = Middle term (if case of odd number of terms)
i.e. 1, 2, 3, 4, 5 -> Mean = Middle term = 3rd Term = 3

➣ Mean = Mean of middle two terms (in case of even number of terms)
i.e. 1, 2, 3, 4, 5 , 6 -> Mean = Mean of Middle two terms = Mean of 3rd Term and 4th term = \(\frac{3+4}{2}\) = 3.5

Watch following video to learn more about Arithmetic Series



Hope it helps!
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Re: a , b , c and d are different positive numbers. The average (arithmeti [#permalink]
BrushMyQuant wrote:
YB114 : yes if you have to find the Mean or Average then you do not need to arrange the terms in ascending or descending. Arranging is done when you have to find things like Median, Mode or Range.

There are special cases when arranging of terms can be helpful for Mean also, example: if the series is in arithmetic progression (i.e. consecutive terms ahve the same common difference)
In that case
➣ Mean = Middle term (if case of odd number of terms)
i.e. 1, 2, 3, 4, 5 -> Mean = Middle term = 3rd Term = 3

➣ Mean = Mean of middle two terms (in case of even number of terms)
i.e. 1, 2, 3, 4, 5 , 6 -> Mean = Mean of Middle two terms = Mean of 3rd Term and 4th term = \(\frac{3+4}{2}\) = 3.5

Watch following video to learn more about Arithmetic Series



Hope it helps!


BrushMyQuant thank you sir.
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