Let the number of lamps and shades manufactured be x and y respectively.

Vertices of feasible region are O(0, 0), A(6, 0), B(4,4)and C(0, 10).

P(A) = 150, P(B) = 160, P(C) = 150 and For max. profit no. of lamps = 4 no. of shades = 4 Maximum Profit = ₹ 160