Question 1 X is a discrete random variable over x E {1,2,3) with probability mass function P(X= 1) = 0.5, P(X=2) = 0.4, P(X= 3) = 0.1 (a) What is E[In X]? Ein (PX)]² (b) What is E In

|f p(x) = var(X)= sd(X)= x 15 , for x = 1, 2, 3, 4, 5, is the probability mass function of a random variable X, then E(X)

Let Y be a discrete random variable with generating function 4 Gy (s) 6 - s What is E(Y) (in decimal)? Answer:

After visiting the Titanic, Captain Brain and Mr. Pinky are taking the Alvin submarine back to the surface of the water. They start 1900 meters below the surface of the water, and ascend at 62 meters per hour.Note: under the water is a negative number.Write an equation to model this situation (use mm for meters and hh for hours)