133+103=420-___ need help

Ahomeowner plans to hang wallpaper on one wall of a bedroom that is 10 feet long if a stripe of wallpaper is 20 inches wide and stripes or hung vertically how many stripes on wall paper with the homeowner required

If you answer 2+2 you will get over 80 points

18 16 11 45 33 11 33 14 18 11 what is the mode for this data set