How did you do that, I really don't see where the -10, 13 and 15 came from unless im being really stupid :|

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- July 17th 2010, 07:09 AMramdrop
How did you do that, I really don't see where the -10, 13 and 15 came from unless im being really stupid :|

- July 17th 2010, 09:45 AMundefined
- July 17th 2010, 11:14 PMramdrop
Oh right okay, well I solved it to have:

Seeing as -4 is impossible the smallest value must be 0 and the maxium, 7 - July 17th 2010, 11:32 PMundefined
You seem to have kept the loosest bounds and discarded the strictest.

Discarding the second and fourth, I get .

IMPORTANT: x is not the value you seek to find the min and max of. You want to find min and max of "the number of male patients under 50 without a back problem" which is 7-x. So...