Let P={x:x∈N and 7x+2>1} and Q={x:x∈N and |x−1|<2}. Then n(PΔQ) is
If P = {x:x ∈ W and 4 ≤ x≤ 8}, and Q = {x:x ∈ N and x < 6}. Find : (i) P∪Q and P∩Q (ii) Is (P∪Q)⊃(P∩Q)