An urn contains 7 red, 3 white, and 6 black balls. One ball is drawn from the urn, it is replaced, and a second ball is drawn. Construct a probability tree to determine the probability that one ball is white W and one is red R. Pr(one W none R) = 3 50 21 Pr(one W none R) = 128 21 Pr(one Wn one R) = 256 7 = 75 Pr(one Wn one R) 2 Pr(one W none R) = 25
An urn contains 7 red, 3 white, and 6 black balls. One ball is drawn from the urn, it is replaced, and a second ball is drawn. Construct a probability tree to determine the probability that one ball is white W and one is red R. Pr(one W none R) = 3 50 21 Pr(one W none R) = 128 21 Pr(one Wn one R) = 256 7 = 75 Pr(one Wn one R) 2 Pr(one W none R) = 25
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:An urn contains 7 red, 3 white, and 6 black balls. One ball is drawn from the urn, it is replaced, and a second
ball is drawn. Construct a probability tree to determine the probability that one ball is white W and one is red
R.
Pr(one W none R) =
21
Pr(one W none R) = 128
Pr(one W none R) =
Pr(one W none R) =
50
Pr(one W none R) =
21
256
7
75
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