Question

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

Answer 1

concept :- A - B shows the relative complement of the set, which represents members of set A which are not part of set B. see figure , here shaded region is shown, this shaded region indicates A - B.

here, X = {a, b, c , d} and Y = {f, b,d, g}
so, Y - X = {f, b, d, g} - {a, b, c, d}
here you can see that b, d are present in both the sets . so, Y - X won't contain b,d and will contain rest elements of Y.

hence, Y - X= {f, g}

Answer 2

Solution :

Given Y = { f , b , d , g }

X = { a , b , c , d }

Y-X ={x:x€Y and x doesn't belongs to X }

= { f , b ,d , g } - { a , b , c , d }

= { f ,g }

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