In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data
A mosaic:
6 sections ==> same number of titles
total titles = 2889
titles in each section = ?
Step 02:
titles in each section.
2889 titles / 6 sections = titles in each section
481.5 = titles in each section
Using multuplication:
481 * 6 = 2886
481* 3 + 482*3 = 2889
The answer is:
6 sections:
3 sections contain = 481 titles
3 sections contain = 482 titles