document.write( "Question 1083321: Ina bag there 4 white balls and some red balls. If the probability of drawing the white ball from the bag is 2/5, how many red balls are there in the bag? \n" ); document.write( "

Algebra.Com's Answer #697333 by ikleyn(52847) $\"\"$ $\"About$

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document.write( "Your equation is \r\n" );
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document.write( " = \r\n" );
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document.write( "where \"r\" is an unknown number of red balls.\r\n" );
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document.write( "Simplify and solve for \"r\":\r\n" );
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document.write( "4*5 = 2*(4+r)  ---->  20 = 8 + 2r  ---->  2r = 20-8  ---->  2r = 12  ---->  r =  = 6.\r\n" );
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document.write( "Answer.  6 red balls.\r\n" );
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