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19 Dec 2004, 19:23
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20. A certain novel is available in hardcover and paperback. If the store stocks a total of 100 copies of this book, how many are paperbacks?
(1) If 20 hardcover versions of this book were sold, there would be three times as many hardcover versions of the book remaining as paperback versions of the book remaining.
(2) If the hardcover version of the book cost twice as much as the paperback version of the book, the total sales of all the books in stock would yield $90
I know that (1) is sufficient but I do no understand why (2) is insufficient
(1) If 20 hardcover versions of this book were sold, there would be three times as many hardcover versions of the book remaining as paperback versions of the book remaining.
(2) If the hardcover version of the book cost twice as much as the paperback version of the book, the total sales of all the books in stock would yield $90
I know that (1) is sufficient but I do no understand why (2) is insufficient
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Updated on: 21 Dec 2004, 08:24
Originally posted by lovely_baby on 21 Dec 2004, 08:23.
Last edited by lovely_baby on 21 Dec 2004, 08:24, edited 1 time in total.
Last edited by lovely_baby on 21 Dec 2004, 08:24, edited 1 time in total.
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The answer is A
I'll explain you why (2) is insufficient
let x- the cost of paperback book
2x-hardcover
y-paperback books, 100-y-handcover
then you have one equation and two unknown
xy+2x(100-y)=90
How can you find the solution?
I'll explain you why (2) is insufficient
let x- the cost of paperback book
2x-hardcover
y-paperback books, 100-y-handcover
then you have one equation and two unknown
xy+2x(100-y)=90
How can you find the solution?
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Data Sufficiency (DS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
