Q. 114.3( 34 Votes )
If X= {a, b, c, d} and Y = {f, b, d, g}, find:
(i) X – Y
(ii) Y – X
(iii) X ∩ Y
Answer :
(i) It is given in the question that,
X = {a, b, c, d}
And, Y = {f, b, d, g}
X - Y implies the elements which are in X but not in Y.
∴ X – Y = {a, b, c, d} - {f, b, d, g}
= {a, c}
(ii) It is given in the question that,
Y = {f, b, d, g}
And, X = {a, b, c, d}
Y - X implies the elements which are in Y but not in X.
∴ Y – X = {f, b, d, g} - {a, b, c, d}
= {f, g}
(iii) It is given in the question that,
X = {a, b, c, d}
And, Y = {f, b, d, g}
∴ 
= {b, d}
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