Question 1134545
z=(x-mean)/sd
for 120 z is (120-151)/151 or -0.205
for 155, it is 4/151 or +0.03
probability of z between those two is 0.0932  That times 500 is 46.6, so 47


>185 is z>(34/151) or +0.225
z>0.225 has probability of 0.4110, which would be 205.49 or 205 students