Answer:
Martin have 5012 stamps in his album.
Explanation:
To solve these problem we need to follow the steps below:
First lets find the total number of stamps in the first 20 pages.
The first 20 pages each have 35 tamps in 5 rows, so the total number of stamps= 20 × 5× 35 =3500 stamps.
In the first 20 pages, he has a total of 3500 stamps in his album.
Then we will proceed to find the total number of stamps in the remaining pages of his album.
The total number of pages in his collector's album is 48.
The remaining pages of his album = 48 - 20 = 28
From the question, the remaining of these pages have 54 stamps each.
So the total number of stamps in the remaining pages = 28×54=1512 stamps
The number of stamps Martin have in his albums =3500 + 1512
=5 012 stamps
Therefore Martin have 5012 stamps in his album.