Question

let U={q,r,s,t,u,v,w,x,y,z} A={q,s,u,w,y} B={q,s,y,z C=v,w,x,y,z determine the following A n B

Answer 1

By A n B, do you mean A intersect B? Like the upside-down U?

Answer 2

yes

Answer 3

(A ∩ B) = the set of elements in BOTH sets A and B.

{q,s,u,w,y} ∩ {q,s,y,z} = { q,

q in both sets? Yes. The, q is a member of (A ∩ B).
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s in both sets A and B?
Yes, then s is a member of (A ∩ B) --> {q,s,u,w,y} ∩ {q,s,y,z} = { q, s, ?

Ask the same questions for elements u, w, and y.
Complete the intersection set.

@negrita1408