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far257
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word pblm 09 Aug 2011, 12:58
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Price of 1 book = 50/n
Price of n-1 books = price of n books - price of 1 book

50 - 50/n = (n50-50)/n = [50(n-1)]/n
C



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aks1985
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word pblm 09 Aug 2011, 13:11
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far257
Price of 1 book = 50/n
Price of n-1 books = price of n books - price of 1 book

50 - 50/n = (n50-50)/n = [50(n-1)]/n
C
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How did you get the price of 1 book? I don't understand the question in the beginning. how did you get n-1?
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far257
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GMAT 1: 750 Q50 V42
GPA: 3.4
WE:Analyst (Consulting)
Products:
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Schools: Kellogg '17 (A) Booth PT '17 (A) CBS '17 (D)
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word pblm 09 Aug 2011, 13:15
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aks1985
far257
Price of 1 book = 50/n
Price of n-1 books = price of n books - price of 1 book

50 - 50/n = (n50-50)/n = [50(n-1)]/n
C

How did you get the price of 1 book? I don't understand the question in the beginning. how did you get n-1?
Show more

n books, right? Let's pretend n = 5, just as an example.

Therefore, if 5 books cost $50, then 1 book costs 50/5 = 10, right? Replace 5 with n, then 1 book costs 50/n. If we wanna find the price of 4 books, we could be like 50 - 50/5 = 40, right? Since n = 5, n-1 = 4.

(n50-50)/n --> factor out 50 from the top
[50(n-1)]/n

huzzah
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aks1985
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word pblm 09 Aug 2011, 13:41
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far257
aks1985
far257
Price of 1 book = 50/n
Price of n-1 books = price of n books - price of 1 book

50 - 50/n = (n50-50)/n = [50(n-1)]/n
C

How did you get the price of 1 book? I don't understand the question in the beginning. how did you get n-1?

n books, right? Let's pretend n = 5, just as an example.

Therefore, if 5 books cost $50, then 1 book costs 50/5 = 10, right? Replace 5 with n, then 1 book costs 50/n. If we wanna find the price of 4 books, we could be like 50 - 50/5 = 40, right? Since n = 5, n-1 = 4.

(n50-50)/n --> factor out 50 from the top
[50(n-1)]/n

huzzah
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ok thanks, i get the factoring out part and the equation that you set up. However, what is the point of stating 'n (n > 1)' in the initial question? That's what threw me off.
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far257
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 [1]
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GMAT 1: 750 Q50 V42
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WE:Analyst (Consulting)
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Schools: Kellogg '17 (A) Booth PT '17 (A) CBS '17 (D)
GMAT 1: 750 Q50 V42
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 [1]
word pblm 09 Aug 2011, 13:43
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I think it means n# of books and n must be greater than 1.



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