document.write( "Question 1194868: Box A contains 5 red balls and 4 white balls. Box B contains 6 red balls and 5 white balls. If one ball is selected at random without looking at the boxes and is found red, what is the probability it came from box A? \n" ); document.write( "
Algebra.Com's Answer #827162 by Boreal(15235)![]() ![]() You can put this solution on YOUR website! There are 20 balls altogether, and 11 are red. \n" ); document.write( "If a red ball is found it has a 5/11 chance coming from box A \n" ); document.write( "======R========W======Total \n" ); document.write( "A------5-----------4----------9 \n" ); document.write( "B------6-----------5---------11 \n" ); document.write( "Total--11-----------9---------20 \n" ); document.write( "If we select a red ball, it has a 5/11 chance of being from box A. \n" ); document.write( " |