Consider another ubiquitous probability-course urn containing well-mixed black and white balls. There are 13 balls in total, 3 white and 10 black. 4 are chosen, one at a time and at random. Let X, be 1 if the i th ball selected is white, and 0 otherwise. For parts (a) and (b), assume that the balls are selected without replacement. (a) Calculate the conditional probability mass function X given that X2 = 1. Px||x, (0|1) = Px,|X, (1|1) = (b) Calculate the conditional probability mass function X1 given that X2 = 0. Px,\X2 (0|0) = Px;|x, (1|0) = For parts (c) and (d), assume that the balls are selected with replacement. (c) Calculate the conditional probability mass function X given that X2 = 1. Px||X, (0|1) = Px,|X, (1|1) = (d) Calculate the conditional probability mass function X given that X2 = 0. Px,|X, (0|0) = Px,|x, (1|0) =

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Consider another ubiquitous probability-course urn containing well-mixed black and white balls. There are 13 balls in
total, 3 white and 10 black. 4 are chosen, one at a time and at random. Let X; be 1 if the i th ball selected is white, and 0
otherwise.
For parts (a) and (b), assume that the balls are selected without replacement.
(a) Calculate the conditional probability mass function X1 given that X2 = 1.
Px||X, (0|1) =
Px;|X, (1|1) =
(b) Calculate the conditional probability mass function X1 given that X2 = 0.
Px,|x, (0|0) =
Px;|X, (1|0) =
For parts (c) and (d), assume that the balls are selected with replacement.
(c) Calculate the conditional probability mass function X1 given that X2 = 1.
Px||X, (0|1) =
Px,1x, (1|1) =
(d) Calculate the conditional probability mass function X given that X2 = 0.
Px||X, (0|0) =
Px,|x, (1|0) =
Transcribed Image Text:Consider another ubiquitous probability-course urn containing well-mixed black and white balls. There are 13 balls in total, 3 white and 10 black. 4 are chosen, one at a time and at random. Let X; be 1 if the i th ball selected is white, and 0 otherwise. For parts (a) and (b), assume that the balls are selected without replacement. (a) Calculate the conditional probability mass function X1 given that X2 = 1. Px||X, (0|1) = Px;|X, (1|1) = (b) Calculate the conditional probability mass function X1 given that X2 = 0. Px,|x, (0|0) = Px;|X, (1|0) = For parts (c) and (d), assume that the balls are selected with replacement. (c) Calculate the conditional probability mass function X1 given that X2 = 1. Px||X, (0|1) = Px,1x, (1|1) = (d) Calculate the conditional probability mass function X given that X2 = 0. Px||X, (0|0) = Px,|x, (1|0) =
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