The test scores in a statistics class are normally distributed with a mean of 60 and a standard deviation of 8. Find: i. P (40 X 70). ii. P (X 85).

x	0	1	2	3	4
P (x = x)	0.15	0.1	0.25	2a	0.1

B. A discrete random variable is represented in the table below. i. Find the value of a. ii. Determine E(X). iii. Calculate Var(X).

C. Given that P (A B) = 0.3, P (B) = 0.2 and P (A B) = 0.15, find P (A).