First, substract the number of pages of the introduction from the total number of pages:
[tex]211-11=200[/tex]This is the number of pages that the chapters use in total.
Since each chapter has 10 pages, divide 200 by 10 to find the total number of chapters:
[tex]\frac{200}{10}=20[/tex]There is a total of 20 chapters on Roger's novel.