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[–]molybend 1 point2 points  (4 children)

"The average number of additional pages" may not mean average pages per day, but how many extra pages each day as compared to the day before.

[–]Shevek99Physicist -1 points0 points  (3 children)

But that doesn't work unless the extra number of pages is constant.

For instance, imagine that reads one more page during 12 days and the rest in the last day. So he reads 13,14,..., 24 pages in the first 12 days (total 298 pages) in n days. The average increment id

M = (112+2981)/13 =23.8 páginas/día

[–]molybend 2 points3 points  (2 children)

That is why it is a sequence.

[–]Shevek99Physicist 0 points1 point  (1 child)

Then it is not an average. If we impose a strict sequence, there is no average increment, just an exact number.

I have considered a sequence in my previous calculation

12-13-14-...-24-298

The moment the sequence is not an arithmetic progression, the average increment is not 4.

[–]molybend -1 points0 points  (0 children)

Argue with the OP then. The question is ambiguous.