Suppose that 3 balls are randomly selected from an urn containing 3 red, 4 white, and 5 blue balls. Let X and Y denote, respectively, the number of red and white balls chosen. (a) Find the distribution of (X, Y ), i. e. find the joint probability mass function of X and Y . (b) Are X and Y independent? [Hint: To show that X and Y are not independent, it is sufficient to find a single pair of numbers x and y such that P(X = x, Y = y) 6= P(X = x, Y = y).]

Let X  and Y be our given values

Step-by-step explanation:

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and if they dont well then thats less customers for them in a less profitable way

plz mark brainliest

answer: 12,000

step-by-step explanation: first you ar e supposed to add. then multiply then subtract