Question 1186998
z=(x-mean)/sd
z>(1900-1332)/725 =0.78
that probability is 0.2177
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z< (-1332/725) =-1.84, and the probability of that is 0.0331
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for 200, z=-1132/725 or -1.561
for 800, z=-532/725 or -0.734
The probability of z being between those two is 0.1722
On a calculator, 2ndVARS2 normalcdf(200,800,1332,725) ENTER

ask how much the teacher wants the z-value rounded to. It will change the result slightly.