A, B and C have Rs.500 between them, A and C together have Rs.200 and B and C Rs.350. How much does C have? Choose one.
A) 50  B) 88  C) 77  D) 66  E) 51

Rationale: "a + b + c = 500 a + c = 200 b + c = 350 - - - - - - - - - - - - - - a + b + 2 c = 550 a + b + c = 500 - - - - - - - - - - - - - - - - c = 50 answer : a"
Answer: A