assuming that the daily wages of works in a particular industry averages birr 11.90 per day and the standard devitation is birr 0.40.If the wages are assumed to be normally distributed determine what percentage of workers receive wages between birr 10.90 and 11.90 birr

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.