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Cardinality of Sets

If A = 1, 2, ...

Question

If A = {1, 2, 3, 4, 5}, B = {4, 5, 6, 7, 8},
C = {7, 8, 9, 10, 11} and D = {10, 11, 12, 13, 14}.

(iii) $B \cup C$

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Solution

Given, $A = {1, 2, 3, 4, 5}, B = {4, 5, 6, 7, 8} C = {7, 8, 9, 10, 11} a n d D = {10, 11, 12, 13, 14}$
Now, $B \cup C$ $= {4, 5, 6, 7, 8}$ $\cup$ ${7, 8, 9, 10, 11}$
$B \cup C$ $= {4, 5, 6, 7, 8, 9, 10, 11}$
Hence, $B \cup C$ $= {4, 5, 6, 7, 8, 9, 10, 11}$

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A = {1, 2, 3, 4, 5}, B = {4, 5, 6, 7, 8}, C = {7, 8, 9, 10, 11} a n d D = {10, 11, 12, 13, 14} .

A \cup C

A = {1, 2, 3, 4, 5}

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

C = {7, 8, 9, 10, 11}

D = {10, 11, 12, 13, 14}

A \cup B

A = {1, 2, 3, 4, 5} B = {4, 5, 6, 7, 8} C = {7, 8, 9, 10, 11} a n d D = {10, 11, 12, 13, 14}

B \cup D

A = {1, 2, 3, 4, 5}, B = {4, 5, 6, 7, 8}, C = {7, 8, 9, 10, 11} a n d D = {10, 11, 12, 13, 14} .

A \cup B \cup C

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Cardinality of Sets

Standard VII Mathematics

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