Solution:
Given that;
A stamp collection consists of 10 albums, each containing 42 pages.
The total number of pages in the 10 albums is
[tex]=10\times42=420\text{ pages}[/tex]
If 40 stamps fits on a page, the number of stamps in the total collection will be
[tex]=420\times40=16800[/tex]
Hence, the answer is 16,800 (Option 5)
