(1) Let marks scored by Neha inSanskrit = x Marks scored in Science = 1.2x Marks scored in Social Science =1.2x + 20 Total marks scored by Neha inthree subjects = 85.5% of 600 =513 ∴ x + 1.2x + 1.2x + 20 = 513 ⇒ 3.4x = 493 ⇒ x = 145 Marks scored in Social Science=1.2×145+20=194