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.

(B' ∩ C)' ∪ A
A. {q, s, u, v, w, x, y}

B. {q, s, u, y}

C. {q, r, s, t, u, w, y, z}

D. {q, r, s, t, u, v, w, x, y}

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.

(B' ∩ C)' ∪ A
A. {q, s, u, v, w, x, y}
	
B. {q, s, u, y}
	
C. {q, r, s, t, u, w, y, z}
	
D. {q, r, s, t, u, v, w, x, y}

reemii · Answer

B' is the complementary set of B ?

anonymous · Answer

huh?

reemii · Answer

what is the meaning pf B' , or just    '    in the line   (B' ∩ C)' ∪ A ?

anonymous · Answer

not b

reemii · Answer

ok!
you must construct this little by little.
B = {q,s,y,z}.
B' = ?

then B'$\cap$C = ?
then (B'$\cap$C)' = ?
etc.

anonymous · Answer

b' all the rest of the letters

reemii · Answer

okay, can you write B'$\cap$C here ?

anonymous · Answer

bso would it be both b and c

reemii · Answer

It's what is in both B' and C, that's why you must list the elements of B' before.

btw, is U the set of all letters?

reemii · Answer

answer A.