Answers

2016-04-28T15:50:04+05:30
First take this sets
A={1,2,3}
B={1,2,3,4,5}
C={1,2,3,4,5,6,7}
Here A⊂B
C-B={6,7}
C-A={4,5,6,7}
Hence C-B is ⊂ C-A
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