Question 474388
{{{P(X < 148) = P(Z < (148 - 160)/30 = -0.4)= 0.3446)}}}


{{{P(100 < X < 180) = P((100 - 160)/30 < Z < (180 - 160)/30) = P(-2 < Z < 0.67) = 0.7258)}}}