110 000 - mean =
110 000 - 99 000 = 11 000 11 000/SD = 11000/21000 = .5238 ~~ .52
look at z = .52 on your positive z - score table z=.0..6950 or 69.5%
This is the cumulative area from the Left on the bell curve !!!
you want the area to the RIGHT of this number (GREATER than 110 000) so 100% - 69.5% = 30.5% will have claims bigger than $110 000
Try #2 it is similar and 3 is kinda similar