In a group of people solicited by a charity, 30% contributed Tk 40 each, 45% contributed Tk 20 each and the rest contributed ...

In a group of people solicited by a charity, 30% contributed Tk 40 each, 45% contributed Tk 20 each and the rest contributed Tk 12 each. What percentage of the total amount came from people who gave Tk 40 each.