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Data Sufficiency: Store S sold a total of 90 copies of a

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Data Sufficiency: Store S sold a total of 90 copies of a [#permalink]

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New post 03 Aug 2009, 12:24
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Data Sufficiency:
Store S sold a total of 90 copies of a certain book during the seven days of last week, and it sold different number of copies on any two of the days.If for the seven days Store S sold the greatest number of copies on Staurday and the second greatest number of copies on Friday, did store S sell more than 11 copies on Friday?
1. Last week Store S sold 8 copies of the book on Thursday.
2. Last week Store S sold 38 copies of the book on Saturday.

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Re: Store S [#permalink]

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New post 03 Aug 2009, 13:31
nitindas wrote:
Data Sufficiency:
Store S sold a total of 90 copies of a certain book during the seven days of last week, and it sold different number of copies on any two of the days.If for the seven days Store S sold the greatest number of copies on Staurday and the second greatest number of copies on Friday, did store S sell more than 11 copies on Friday?
1. Last week Store S sold 8 copies of the book on Thursday.
2. Last week Store S sold 38 copies of the book on Saturday.


a+b+c+d+e+f+g = 90 , a,b,...,g are chronologically representing the sales for every day of the week starting a = Friday
b>a, a,b are each greater than each of c,d,e,f,g

is a>11

from 1
g = 8 , a,b are each > 8 ..........insuff

from2
b = 38.......suff

if the second largest is less than or equall 11 then the rest of the week's sales will look like (10,9,8,7,6) and the total will never add up to 90

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Re: Store S [#permalink]

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New post 03 Aug 2009, 16:40
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statement 2 is sufficient, B

if saturday sold 38, then we have 52 left to be sold, and the remaining 6 days has to be all different, suppose we sold 11 books on friday, then the max number of books sold is 11+10+9+8+7+6 = 51, which is not enough, therefore friday needs to be at least 12 books...

Kudos [?]: 44 [1], given: 9

Re: Store S   [#permalink] 03 Aug 2009, 16:40
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Data Sufficiency: Store S sold a total of 90 copies of a

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