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Re: other tricky ds statistics [#permalink]
27 Feb 2008, 17:06

1

This post received KUDOS

prasannar wrote:

I am not clear, using both the statements

statement 1 & 2 hold good for the below set of integers 1,2,-3,4 -> product -ve 1,2,3,4-> +ve

am I missing anything?

product of the greatest and the smallest has to be positive. In the set that you have chosen (1,2,-3,4), this product is negative. You have chosen an incorrect set. _________________

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Re: other tricky ds statistics [#permalink]
27 Feb 2008, 23:36

1

This post received KUDOS

prasannar wrote:

I am not clear, using both the statements

statement 1 & 2 hold good for the below set of integers 1,2,-3,4 -> product -ve 1,2,3,4-> +ve

am I missing anything?

Prasannar,

1. product of the greatest and the smallest in the list is positive. They must be the same sign. So, this statement limits the two ends of the list. For example.

1.1 if the smallest negative, the greatest must be negative. So the list must start from the negative and end at the negative [-5.....-1] 1.2 if the smallest positive, the greatest must be positive. So the list must start from the positive and end at the positive. [1.....5]

2. So the list you make example is not correct:

vscid wrote:

statement 1 & 2 hold good for the below set of integers 1,2,-3,4 -> product -ve 1,2,3,4-> +ve