If A = {1,2,3,6} and B = {2,4,5,7}, then A - B = _____?
- {1,2,3,4,5,6,7}
- {1,3,6}
- {4,5,7}
- None of these
Explanation
A - B means elements that are in A but not in B.
A = {1,2,3,6}
B = {2,4,5,7}
Elements in A but not in B: 1, 3, 6
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