A, B and C have Rs.500 between them, A and C together have Rs.200 and B and C Rs.320. How much does C have? Select:
A) 50	B) 78	C) 267	D) 20	E) 27

Rationale: a + b + c = 500 a + c = 200 b + c = 320 - - - - - - - - - - - - - - a + b + 2 c = 520 a + b + c = 500 - - - - - - - - - - - - - - - - c = 20 answer : d
Answer: D