Question

If X = {a, b, c, d} and Y = {f, b, d, g}, find :

(i) X - Y (ii) Y - X (iii) $X\cap Y$

Answer 1

Here X = {a, b, c, d+ and Y = {f, b, d, g}

(i) X - Y = {a, b, c, d} - {f, b, d, g}

= {a, c}

(ii) Y - X = {f, b, d, g} - {a, b, c, d}

= {f, g}

(iii) $X\cap Y$ = {a, b, c, d} $\cap$ {f, b, d, g}

= {b, d}