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| Teaching Since: | May 2017 |
| Last Sign in: | 432 Weeks Ago |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
polya’s urn scheme. An urn contains 4 white balls and 6 black balls. A ball is chosen at random, and its color noted. The ball is then replaced, along with 3 more balls of the same color (so that there are now 13 balls in the urn). Then another ball is drawn at random from the urn.
a) Find the chance that the second ball drawn is white. (Draw an appropriate tree diagram.)
b) Given that the second ball drawn is white. What is the probability that the first ball drawn is black?
c) Suppose the original contents of the urn are w white and b black balls, and that after a ball is drawn from the urn, it is replaced along with d more balls of the same color. In part a), w was 4, b was 6, and d was 3.. show that the chance that the second ball drawn is white is
[Note that the probability above does not depend on the value of d.]
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