If 15% of 30% of 50% of a number is 108, then what is the number?
Choose the correct option.
A) 4000	B) 3050	C) 4400	D) 4800	E) none of these

Rationale: "let the number be a given , 15 / 100 * 30 / 100 * 50 / 100 * a = 108 = > 3 / 20 * 3 / 10 * 1 / 2 * a = 108 = > a = 10 * 20 * 10 * 2 = 4800 . answer : d"
Answer: D