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2014-10-01T07:43:15+05:30

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Let core java section requires = 7x pages
Advanced java section requires = 2x pages

Total pages = 7x +2x = 9x 
But but total pages = 450
Thus 9x = 450
or x=50

So core java section requires = 7x = 7X50 = 350 pages
Advanced java section requires = 2x = 2X50 = 100 pages
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2014-10-01T07:57:39+05:30
Let
core java section pages = 7x pages
Advanced java section pages = 2x pages
total java book pages=>450=(7x+2x)pages
                              =>9x=450
                              =>x=450/9
                              =>x=50
core java pages=>7x=7*50=350 pages
advanced java pages=>2x=2*50=100 pages
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