I need help with this probability question please...i have no idea what I am doing here....thanks in advance... A die is rolled 4 times. Let X and Y be the number of appearances of 1 and 6 respectively. Find the joint PMF of (X, Y).
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Originally Posted by rangergiya I need help with this probability question please...i have no idea what I am doing here....thanks in advance... A die is rolled 4 times. Let X and Y be the number of appearances of 1 and 6 respectively. Find the joint PMF of (X, Y). If you know the multinomial distribution use that with possible outcomes 1, 6, other; with probabilitirs 1/6, 1/6, 2/3 respectivly. Otherwise list all the possible outcomes (1, 6, other) compute their probabilities and sum those with the same number 1's and 6's. CB
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