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Edd2
a fost răspuns

A java book is comprised of two sections:
Core and advanced in the ratio 7:2.
How much of esch type will be needes to make a book of 450 pages?

Răspuns :

C=n.o of pages in the Core section
A=n.o of pages in the Advanced section

C/A=7/2=>7A=2C=>A=2C/7

C+A=450

C+2C/7=450
9C/7=450
C=7*450/9=350 pages
A=2*350/7=100 pages

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