Question 536859:  Find all sets S , if any, such that S ⊆ { 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 } and S satisfies each and all of the following conditions: 
i) S ∩ { 1 , 2 , 3 , 4 , 5 } = { 2 , 4 } , 
ii) S ∪ { 2 , 3 , 5 , 6 , 8 } = { 2 , 3 , 4 , 5 , 6 , 7 , 8 } , and 
iii) S – { 3 , 4 , 7 , 8 , 9 } = { 1 , 5 , 6 } 
 
I know how to do i, ii, but iii seems to be little tricky and how to S that satisfies ALL of the following? Thanks! 
 Answer by Edwin McCravy(20064)      (Show Source): 
You can  put this solution on YOUR website! You have copied something wrong!
 
i) tells us that 1 is NOT 
a member (element) of S 
yet iii) tells us that 1 IS an element 
(member) of S.
 
 
 
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