Question

Im an older lady not the best at this type of math please help

Answer 1

We need to first find the intersection between Q and R, which is the common elements between both groups. We have:

$Q\cap R=\mleft\lbrace r,e,x\mright\rbrace$

Now we need to determine the union between them:

$P\cup(Q\cap R)=\mleft\lbrace e,x,a,c,t,r,e,x\mright\rbrace$