Question 2 Chapter B-textbook, mini quiz question 10. Not yet answered A bank operates both a drive-up facility and a walk-up window. On a randomly selected day, let X: the proportion of time that the drive-up facility is in use (at least one customer is being served or waiting to be served) Marked out of and Y=the proportion of time that the walk-up window is in use. Suppose the joint probability density function of X and Y is given by 1.00 6 W19 f(x,y)=*(1+y2), osxsl, OSySl question 5 The probability that neither facility is busy more than one-quarter of the time is Select one: C) a. 0.67 o b. 0.0004 0 c. 0.101968 0 d. 0.0109 Question 3 Chapter 8, textbook, Mini quiz question number 6 Not yet answered Let X, Y be a random variable with density function Marked out of f ( x, y ) = 2, 0