1)GPA of freshmen students follows a normal distribution with mean 2.1 and standard deviation 0.6.
How many freshmen will score between 2.5 and 3.5 if the class has 300 students?
2) Let X be a normal random variable with mean \mu = 2 and variance \sigma ^{^{^{2}}} = 16
Find : a) P (X>8)
b) P(|x| > 8)
c) E(2 + 3X + 4X^2)
d) Variance(2+3X)