A man buy a book in Rs50 & sale it Rs100. What is the rate of profit ???
Choose one:
A) 10 %	B) 100 %	C) 30 %	D) 25 %	E) 28 %

Rationale: "cp = 50 sp = 100 profit = 100 - 50 = 50 % = 50 / 50 * 100 = 100 % answer : b"
Answer: B