Robert spent $100 in buying raw materials, $125 in buying machinery and 10% of the total amount he had as cash with him. What was the total amount? Choose the correct answer.
A) $ 150	B) $ 210	C) $ 250	D) $ 160	E) $ 200

Rationale: let the total amount be x then , ( 100 - 10 ) % of x = 100 + 125 90 % of x = 225 90 x / 100 = 225 x = $ 250 answer is c
Answer: C