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A java book is comprised of 2 sections core and advanced Java in the ration 7:2. How much of each type of content will be needed to make a book of 450

Do you mean how many pages do both the sections contains which total up to 450 pages?


Supppose the 2 sections as x

7:2 will be changed into 7x and 2x.

according to the condition,
9x= 450
x= 450÷9
x= 50

7x =50×7
= 350

2x = 50×2
= 100

the addition of these 2 numbers i.e 350 and 100 is equal to 450....

hope its the correct answer and hope it helped u
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