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PS minimum

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Director
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PS minimum [#permalink] New post 11 Mar 2006, 15:22
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Hi,

I don't really understand this pb:

If a+b+c+d is a positive number, a minimum of x of the numbers a,b,c, and d must be positive where x equal to
0
1
2
3
4
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Re: PS minimum [#permalink] New post 11 Mar 2006, 16:23
karlfurt wrote:
Hi,

I don't really understand this pb:

If a+b+c+d is a positive number, a minimum of x of the numbers a,b,c, and d must be positive where x equal to
0
1
2
3
4


I would say 1

as we are adding, we can have 3 negative numbers but if the sum of those three is less than the amount of the only one that is positive, then the sum of a+b+c+d would be positive
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 [#permalink] New post 11 Mar 2006, 16:36
You're right!

I just understood.

I tought x = min(a,b,c,d)... :?
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 [#permalink] New post 11 Mar 2006, 19:55
I also think it is 1. as explained above there could be 3 -ve and 1 +ve, Since 1 is the minimum value > 0. So answer is 1
  [#permalink] 11 Mar 2006, 19:55
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