You have a population of widgets that has a normal distribut

You have a population of widgets that has a normal distribution for the weight of the widgets. The mean X weight is 50 lbs. with a standard deviation of 1.5 lbs. You want to select from your population only those widgets which have 10% or less variation from the mean weight (or x greater than or equal to 45 lbs or x less than or equal to 55lbs.) What percent of your population can you expect?