The maximum value of \( Z = 4x + y \) for a L.P.P. whose feasible region is given below is: 
Step 1: Identify the corner points of the feasible region
From the graph, the vertices of the feasible region are: \[ A(0, 50), \, B(20, 30), \, C(30, 0). \] Step 2: Substitute corner points into \( Z = 4x + y \)
Evaluate \( Z \) at each vertex: \[ Z_A = 4(0) + 50 = 50, \quad Z_B = 4(20) + 30 = 110, \quad Z_C = 4(30) + 0 = 120. \] Step 3: Find the maximum value
The maximum value of \( Z \) occurs at \( C(30, 0) \), where \( Z = 120 \).
Step 4: Verify the options
The maximum value is \( 120 \), which corresponds to option (C).
Determine whether each of the following relations are reflexive, symmetric, and transitive.
Show that the relation R in the set R of real numbers, defined as
R = {(a, b): a ≤ b2 } is neither reflexive nor symmetric nor transitive.
Check whether the relation R defined in the set {1, 2, 3, 4, 5, 6} as
R = {(a, b): b = a + 1} is reflexive, symmetric or transitive.