document.write( "Question 470963: An urn contains 10 numbered balls, of which 6 are red and 4 are blue. A sample of 4 balls is to be selected. How many samples contain at least 3 red balls? \n" ); document.write( "

Algebra.Com's Answer #323036 by ewatrrr(24785) $\"\"$ $\"About$

You can put this solution on YOUR website!

 
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document.write( "Hi,
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document.write( "Note: The probability of x successes in n trials is: 
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document.write( "P = nCx*  where p and q are the probabilities of success and failure respectively. 
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document.write( "In this case p = .6(red)& q = .4
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document.write( "nCx =   n = 4
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document.write( "P(3 or 4 red) = P(3red) + P(4red) = 4(.6)^4*.4 + (.6)^4 = .4752 
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document.write( "sry, did not read it properly: 
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document.write( " 47.52% of the  samples contain at least 3 red.
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