A Java book is comprised of two sections core and advanced Java in the ratio 7:2 how much of each type of content will be need to make a book of 450 pages

Total number of pages in the Java book = 450

Ratio in which the pages have been divided between core and advanced is = 7:2

Let us assume the common ratio to be = x

Then, the equation can be written as

7x + 2x = 450

9x = 450

x = 450/9

= 50

Then

The number of core pages in the Java book = 7 * 50

= 350

The number of advanced pages in the Java book = 2 * 50

= 100

So the book will have 350 core pages and 100 advanced pages.