Question

a java book is comprised of two sections core and advanced java
ratio 7:2. hpw much of each type of content will be needed to make a book of 450 pages?

Answer 1

Let the common multiple be x. SO, number of pages =7x+2x=9x =450
x=450/9=50
Core=7x =7*50=350
Advanced=2x=2*50=100

Answer 2

please see the attachment.content of core java is 350 and advanced java is 100.