Consider the Venn Diagram below.
n(A)\displaystyle {n}{\left({A}\right)} =
n(B)\displaystyle {n}{\left({B}\right)}=
n(A∩B)\displaystyle {n}{\left({A}\cap{B}\right)}=
n(A∪B)\displaystyle {n}{\left({A}\cup{B}\right)}=
n(A‾)\displaystyle {n}{\left(\overline{{{A}}}\right)}=
n(B‾)\displaystyle {n}{\left(\overline{{{B}}}\right)}=

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