Question 929386
mean = 40 , SD = 20 , {{{z = blue(x - 40)/blue(20)}}}
P(x > 60) = P(z > 20/20)= normalcdf(1,100) = .1587  0r 15.87%
P(30 < x < 50) = P(-10/20 < z < 10/20) = normalcdf(-1,1) = .6827 0r 68.27%
P(x < 10) = P(z < -30/20) = normalcdf(-100, -3/2) = .0668 0r 6.68%