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Re: DS: Average of 11 integers [#permalink]
25 Jan 2008, 12:03
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1) The average of the first 9 integers is 7 2) The average of the last 9 integers is 9
1) since the numbers are consequtive, the average of 9 numbers would be the same as the median. Therefore the 5th number in the sequence is 7
The sequence would be 3,4,5,6,7,8,9,10,11 .. the next two numbers would obviously be 12 and 13
Sufficient
2) since the numbers are consequtive, the average of 9 numbers would be the same as the median. Therefore the 7th number in the sequence is 9 The sequence would be 5,6,7,8,9,10,11,12,13 .. the next two numbers would obviously be 3 and 4
Sufficient
Answer would be D
