Question

Find the symmetric difference between the following sets

X = {5, 6, 7} and Y = {5, 7, 9, 10}

Answer 1

X = {5, 6, 7}

Y = {5, 7, 9, 10}

X – Y = {5, 6, 7} – {5, 7, 9, 10} = {6}

Y – X = {5, 6, 9, 10} – {5, 6, 7}

= {9, 10}

X ∆ Y = (X – Y) ∪ (Y – X)

= {6} ∪ {9, 10}

= {6, 9, 10}