Answer:
[tex]\lvert P\cap Q\rvert=\lbrace x,r,e\rbrace[/tex]
Step-by-step explanation:
Intersection "∩" means when the two groups intersect, in other words, the intersection is the common values between the groups.
Therefore,
[tex]\lvert P\cap Q\rvert=\lbrace x,r,e\rbrace[/tex]
