After being marked down 20 percent, a calculator sells for K. 10. orginal selling price was-
A
Tk. 20
B
Tk. 12.5
C
Tk. 12
D
Tk 9
Correct Answer: Tk. 12.5
Present Tk. 80 if previous Tk. 100 present Tk. 1 if previous Tk. 100/80 present Tk. 10 if previous Tk ( 100×10)/ 80 = 12.5 Tk