8) If 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}. What are the elements in the set below:-

(A u B')'n C'

Solution:

(A u B')'n C'

= { q, s, u, w, y)U{r,t,u,v,w,x}n{q, r, s, t, u}

= {q, r,s,t, u, v,w,x, y}n{q, r, s, t, u}

= {q, r, s, t, u}

The answer is {q, r, s, t, u}