SSC CGL 16 Aug 2015 Shift 2 Paper

∠ APB = 110° = ∠ CPD
∴ ∠ APD = 180° – 110° = 70° = ∠ BPC
∴ ∠ PCB = 180° – 70° – 30° = 80°
Angles subtended by same arcs at the circumference are equal.
∴ ∠ ACB or ∠ PCB = ∠ ADB = 80°