Agirl scout troop sold cookies to raise funds. each troop member recorded the number of boxes she sold. the number of boxes she sold. the number of boxes sold was normally distributed with a mean of 22 boxes sold and a standard deviation of 4 boxes. in order to determine how many boxes ould be sold the next year, the troop leader decided to focus on the range made from the bottom 30% to the top 20%. find the number of boxes that represent the desired range values.