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If A={2x : xN},   B={3x : xN} and C={5x : xN) then A(BC) is equal to 

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a
{15,30,45,…}
b
{10,20,30…}
c
30,60,90,…
d
{7,14,21…}

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detailed solution

Correct option is C

(A∩B)∩C={2×3×5 x : x∈N}={30x : x∈N}

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