Answer:
The whole book has 125 pages.
Explanation:
Let's use a proportion to solve the problem. We can set up the proportion as:
(3/5) = 75/x
Where x is the total number of pages in the book.
To solve for x, we can cross-multiply and simplify:
3x = 5(75)
3x = 375
x = 375/3
x = 125