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Question

Let A={a,b,c,d,e} and B={a,c,g,f}. Find A−B and B−A.

A
{b,d,e}; {g,f}
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B
{b,d}; {f}
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C
{ϕ}; {g,f}
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D
{a,b,c,d,e}; {g,f}
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Solution

The correct option is A {b,d,e}; {g,f}
A={a,b,c,d,e}
B={a,c,g,f}
AB={a,b,c,d,e}{a,c,g,f}={b,d,e}
BA={a,c,g,f}{a,b,c,d,e}={g,f}

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