Need math help with a bookshop, percentages and ratios

Nov 16th, 2015
Price: $5 USD

Question description

At the start of the week a bookshop had science and art books in the ratio 2:5. By the end of the week 20% of each type of books were sold.  And 2240 books of both type were unsold.  How many books of each type were there at the start of the week?

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(Top Tutor) Borys S
School: Carnegie Mellon University

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