The bankers discount calculated for one year is 21times of his gain. find rate of interest??

a)7%
b)6%
c)4%
d)none

• Bankers Gain = Bankers Discount - True Discount
  And True Discount = (BG*100)/Time*Rate
  as given BD = 21 BG and time =1 year
  so
  BG=21BG - (BG*100)/Time*Rate
  by solving it R= 5 % so answer should be none
  
• 9 years agoHelpfull: Yes(2) No(1)