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Difficulty:
55%
(hard)
Question Stats:
59% (01:45) correct
41%
(02:09)
wrong
based on 189
sessions
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If the total price for n copies of a book is $31.50, what is the price per copy of the book?
(1) If twice as many copies were bought for the same total price, the price per copy would be $1.75.
(2) If 4 fewer copies were bought for the same total price, the price per copy would be $2.80 greater.
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(1) If twice as many copies were bought for the same total price, the price per copy would be $1.75.
(2) If 4 fewer copies were bought for the same total price, the price per copy would be $2.80 greater.
This is a Data Sufficiency Butler Question
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Total price = $31.5; total no. of copies = n
We have to find 31.5/n
Statement 1
31.5/2n = 1.75
Multiplying both sides by 2
31.5/n = 3.5 SUFFICIENT
Statement 2
31.5/(n-4) = 31.5/n + 2.8
You will get a quadratic equation, with its roots a positive and negative value for n. n has to be positive as it is no. of copies of books. SUFFICIENT
Answer D.
_________________
We have to find 31.5/n
Statement 1
31.5/2n = 1.75
Multiplying both sides by 2
31.5/n = 3.5 SUFFICIENT
Statement 2
31.5/(n-4) = 31.5/n + 2.8
You will get a quadratic equation, with its roots a positive and negative value for n. n has to be positive as it is no. of copies of books. SUFFICIENT
Answer D.
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