Question 1156371
z=(x-mean )/sd
first is z<(38000-43200)/3500=-5200/3500=-1.49
probability is 0.0681

second is z>1800/3500 or 0.51. probability is 0.3050

third is the z between (-1.49 and +0.51) or the complement of the sum above 
the answer for both is the same or 0.6269