1. Consider two mutually exclusive events A and B. The probability that event A occurs is P(A) = 0.80, then P(B) =

2.If the random variable X is normally distributed with a mean of 60 and a variance of 100, then P(X > 66) =

3. If X and Y are two independent random variables with V(X) = 4, V(Y) = 3 and COV(X,Y) = 1, then V(2X - 3Y) =

4. Let X be a binomial random variable. The probability P(X = 2), if n = 8 and p = 0.4

5. A multiple-choice quiz has 25 questions. Each question has four possible answers, of which only one is correct. The probability that sheer guesswork will yield at least 7 correct answers is:

6. Consider two random variables X and Y with E(X)= 4, E(Y) = 2, E(XY) = 12, V(X) = 16 and V(Y) = 25, then the correlation coefficient between X and Y