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jlgdr
Joined: 06 Sep 2013
Last visit: 24 Jul 2015
Posts: 1,302
Own Kudos:
Given Kudos: 355
Concentration: Finance
Schools: Wharton '17 (A) HBS '17 (WA$)
20 Sep 2013, 17:09
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C
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If S is a set of consecutive integers, what is the sum of the elements in S?
(1) The largest element in S is 55.
(2) There are 11 elements in S.
(1) The largest element in S is 55.
(2) There are 11 elements in S.
20 Sep 2013, 18:00
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If S is a set of consecutive integers, what is the sum of the elements in S?
(1) The largest element in S is 55. We don't know how many integers are there in the set. Not sufficient.
(2) There are 11 elements in S. We don't know which 11 consecutive integers are there in the set. Not sufficient.
(1)+(2) The largest element in a set of 11 consecutive integers is 55. We know exactly what set it is, thus we can find the sum. Sufficient.
Answer: C.
(1) The largest element in S is 55. We don't know how many integers are there in the set. Not sufficient.
(2) There are 11 elements in S. We don't know which 11 consecutive integers are there in the set. Not sufficient.
(1)+(2) The largest element in a set of 11 consecutive integers is 55. We know exactly what set it is, thus we can find the sum. Sufficient.
Answer: C.
10 Mar 2015, 17:46
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jlgdr
Statement 1 gives only the largest number which is not sufficient to determine sum of elements
Statement 2 gives number of elements , doesn't tell whether elements are positive or negative.
1+2 C combining
lets assume smallest element in set is x
then x+(11-1)=55,X =45, once we have smallest element in set, its easier to determine sum.
So Answer:C
