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answered: 2 problems
|Probability-and-statistics/348343: Urn A has 6 white and 4 red balls. Urn B has 16 white and 13 red balls. We flip a fair coin. If the oucome is heads, then a ball from urn A is selected, whereas if the oucome is tails, then a ball from urn B is selected. Suppose that a red ball is selected. What is the probability that the coin landed heads?
Please show your work. Thank you so much! :]
Answer 249044 by math10123(2) on 2010-09-26 18:27:01 (Show Source):
You can put this solution on YOUR website!
urn a has 4 red balls. whenever a head appears urn a gets it. So the problem asks to write the probability of getting a red ball. So the answer is 4/39.