Eleven > Sets and Set Theory
If $\rm U$= {1, 2, 3, 4, 5, 6, 7, 8, 9}, $\rm A $= {1, 2, 3, 4}, $\rm B $ = {2, 4, 6, 8 } and $\rm C $ = {1, 4, 5, 6 }, find $ \rm \overline{(B - C)} $
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