8. It is a weighted average of the possible values that the random variable can take. A. Mean C. Standard Deviation B. Variance D. Probability Distribution 9. The appropriate formula in finding the mean of discrete random variable is C. E(x) = Hx = Ex-p (x) D. E(x) = Hx = Ex p (x)² A. E(x) = Hx =Ex•p (x) B. E(x) = Hx = Ex+p (x) 10. What formula is used to find the variance of discrete random variable? A. o = E(x+µH)²•p(x); for all possible values of x B. o = E(x –H)².p(x); for all possible values of X C. o = Ex p(x); for all possible values of x D. o? = E(P(x) + µ)² · x ; for all possible values of x

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba…

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.