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The results of a certain experiment included 6 data values

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by Robinmrtha » Wed Jun 17, 2009 3:02 am
The results of a certain experiment included 6 data values that were all multiples of the same number c, namely, c, 8c, 2c, 5c, 4c, and 4c. Was the average (arithmetic mean) of the 6 data values greater than 8?
(1) c < 4
(2) c > 2
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by shashank.mehra » Wed Jun 17, 2009 5:08 am
AM = Sum of (c, 8c, 2c, 5c, 4c, and 4c) / 6 = 4c

1) C< 4 gives AM < 16 Not sufficient
2) C > 2 give AM > 8 Sufficient

B
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by abhinav85 » Wed Jun 17, 2009 11:51 am
Hey Shashank

AM = Sum of (c, 8c, 2c, 5c, 4c, and 4c) / 6 = 4c

1) C< 4 gives AM < 16 Not sufficient
2) C > 2 give AM > 8 Sufficient

B

I think the question is asking that what is the AM of values greater than
8??

IMO C
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by Domnu » Wed Jun 17, 2009 11:56 am
I think the answer is B. The average is 4c, and we need c > 2. c < 4 says that the average is less than 16, but this is meaningless to us.
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by ssmiles08 » Wed Jun 17, 2009 12:00 pm
IMO B as well.

average is 4c and if C > 2 (lets say 2.1) it will still be greater than 8.
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