Question

Given C={5 ,10,15,20}B={25},find AuB

Answer 1

$Given \: A = \{ 5,10,15,20 \}\: and \:$

$B = \{ 25 \}$

$Now, i)\red{ A\cup B \}$

$= \{ 5,10,15,20\} \cup \{ 25\}$

$= \{ 5,10,15,20,25\}$

$ii )A\cap B \\= \{ 5,10,15,20\} \cap \{ 25\}$

$= \{ \: \}$

Therefore.,

$\red{ A \cup B }\green { = \{ 5,10,15,20,25\} }$

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