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Help please! An urn contains 9 white balls and 15 red balls.A sample of four balls is selected at random from the urn.What is the
Help please!
An urn contains 9 white balls and 15 red balls.A sample of four balls is selected at random from the urn.What is the probability that the sample contains two white balls and two red ones?
a)0.0730
b)0.3557
c)0.2780
d)0.1304
e)0.0395
f)None of the above.
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