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April 18, 2015

Homework Help: lpu collage

Posted by sunil on Monday, January 21, 2013 at 10:49pm.

An urn contains 7 red and 3 white marbles. Three marbles are drawn from the urn one after another.
Find the probability that first two are red and third is white if,
a) Marbles drawn are replaced after every draw.
b) Marbles drawn are not replaced after every draw.

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