answer assuming that the daily wages for workers in a particular industry average birr 11.90 per day and the standard deviation is birr 0.40 . if the wages are assumed to be normally distributed , determine what percentage of workers receive wages A between birr 10.90 and birr 11.90 B between birr 10.89 and birr 12.40 C between birr 12.20 and birr 13.10 D less than birr 11.00 E more than birr 12.95​