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Question

Given that U={3,7,9,11,15,17,18},M={3,7,9,11} and N={7,11,15,17}
Find
(i) MN
(ii) NM
(iii) NM
(iv) MN
(v) M(MN)
(vi) N(NM)
(vii) n(MN)

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Solution

U={3,7,9,11,15,17,18}
M={3,7,9,11}
N={7,11,15,17}
(1)MN={3,9}
(2)NM={15,17}
(3)N={3,9,18}
M={3,7,9,11}
NM={18}
(4)M={15,17,18}
MN={18}
(5)M(MN)={3,9}
(6)N(NM)={7,11,15,17}
(7)n(MN)=2

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