The union of the following pair of sets is:
$C = {a, e, i, o, u}, D = {a, b, c, d}$

C \cup D = {c, d, i, e, o, u}

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C \cup D = {b, c, d, i, e, o, u}

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C \cup D = {a, b, c, d, i, e, o}

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None of these

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Solution

The correct option is D None of these
Since, $A \cup B = {x | x \in A o r x \in B}$
$In other words union is combined collection of A and B.$
$∴ C \cup D = {a, b, c, d, e, i, o, u}$

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The union of the following pair of sets is:C={a,e,i,o,u},D={a,b,c,d}

The correct option is D None of theseSince, A∪B={x|x∈Aorx∈B}In other words union is combined collection of A and B.∴C∪D={a,b,c,d,e,i,o,u}

The union of the following pair of sets is:
$C = {a, e, i, o, u}, D = {a, b, c, d}$

The correct option is D None of these
Since, $A \cup B = {x | x \in A o r x \in B}$
$In other words union is combined collection of A and B.$
$∴ C \cup D = {a, b, c, d, e, i, o, u}$