Math Chapter Wise Tangent, Normal, Increasing, Decreasing And Maxima/Minima Of A Function Of One Variable English MCQ UKPSC Lecturer (Mains) 2020 Q.Given that x + y = 20 and P = x2 y3. Then P is maximum when? Ax= 6, y =14 Bx= 15, y =5 Cx= 12, y =8 Dx= 8, y =12 Show answer Correct answer: x= 8, y =12