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Difference of Two Sets

If A =1,2,3,4...

Question

If A = {1, 2, 3, 4}and B = {4, 5, 6, 7, 8}, then AUB = ?

A

{1, 2, 3, 5, 6, 7, 8}

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B

{1, 2, 3, 4, 5, 6, 7, 8}

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C

{1, 2, 3, 4, 4, 5, 6, 7, 8}

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D

{1, 2, 5, 6, 7, 8}

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Solution

The correct option is B
{1, 2, 3, 4, 5, 6, 7, 8}

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Similar questions

Q. If A = {1, 2, 3, 4}, B = {3, 4, 5, 6}, C = {5, 6, 7, 8}. Find A ∪ B ∪ C.

A

B

be two smallest sets such that

A \cup {1} = {1, 2, 3, 4}

B \cup {5} = {4, 5, 6, 7, 8} .

P = A - B

Q = B - A,

then the number of relations from

P

Q

A

B

be two smallest sets such that

A \cup {1} = {1, 2, 3, 4}

B \cup {5} = {4, 5, 6, 7, 8} .

P = A - B

Q = B - A,

then the number of relations from

P

Q

A = {1, 2, 3}, B = {4, 5, 6, 7, 8},

C = {4, 8, 12, 16, 20},

n [(A \times B) \cup (A \times C)] =

B = {1, 2, 3}

A = {4, 5, 6, 7, 8}

, then the number of surjections from

A

B

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