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an urn contain 5 redand 2 black balls. two balls are randomly drawn. let X represents the number of black balls. what are the possible values of X? Is X a random variable?
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Nov 22, 2013
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divyarathaur_1
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An urn contains 5 red and 2 black balls. Two balls are randomly drawn. Let X represent the number of black balls. What are the possible values of X? Is X a random variable ?
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Nov 27, 2012
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Jul 8, 2014
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Jul 8, 2014
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One urn contains two black balls (labelled $B_1,B_2$) and one white ball.A second urn contains one black ball and two white balls (labelled $W_1,W_2$).Suppose the following experiment is performed.One of the two urns is chosen at random.Next a ball is randomly chosen from the urn.Then a second ball is chosen at random from the same urn without replacing the first ball.What is the probability that two black balls are chosen?
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Urn A contain 1 white, 2 black, 3 red balls. Urn B contain 2 white, 1 black, 1 red balls. Urn C contains 4 white, 5 black, 3 red balls. Two balls are drawn from one of the Urn and found to be one white and one red. Find the probabilities that they come from Urns A, B or C.
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Feb 5, 2013
by
meena.p
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An urn contains 5 red and 5 black balls. A ball is drawn at random, its colour is noted and is returned to the urn. Moreover, 2 additional balls of the colour drawn are put in the urn and then a ball is drawn at random. What is the probability that the second ball is red?
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Nov 27, 2012
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3 balls are drawn randomly from a bag contains 3 black, 5 red and 4 blue balls.What is the probability that the balls drawn contain balls of different colors?
asked
Aug 27, 2015
by
pady_1
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class9
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