The bankerâ€™s gain on a sum due 3 years hence at 12% per annum is Rs. 180. The bankerâ€™s discount is
Choose one: A) rs . 960 B) rs . 840 C) rs . 1020 D) rs . 680 E) none

Rationale: solution t . d = ( b . g x 100 / r x t ) = rs . ( 180 x 100 / 12 x 3 ) = rs . 500 . b . d = rs ( 500 + 180 ) = rs . 680 . answer d
Answer: D