SOLUTION: If P={1,2,3,4}, write down all the subsets of P which have exactly two elements

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Question 1183669: If P={1,2,3,4}, write down all the subsets of P which have exactly two elements
Answer by ikleyn(52805) About Me  (Show Source):
You can put this solution on YOUR website!
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Start from these subsets   (1,2),   (1,3), . . .   and then continue on your own.


Remember that in each pair the elements must be different.


Also remember that the pairs like   (2,3)   and   (3,2),   which differ by the order only,  represent the  SAME  subset.


The total number of such subsets is   %284%2A3%29%2F2 = 2*3 = 6,

so you should be able to complete this job on your own.


You may report me about your progress.


If you have question/questions,  do not hesitate to ask.