document.write( "Question 1161325: please help me solve this question maam/sir;
\n" ); document.write( "Box 1 contains 30 red and 70 white balls, box 2 contains 50 red and 50 white balls, and box 3 contains 75 red and 25 white balls. The three boxes are all emptied into a large box, and a ball is selected at random. If the selected ball is red, what is the probability that it came from box 1? \n" ); document.write( "

Algebra.Com's Answer #784875 by ikleyn(52781) $\"\"$ $\"About$

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document.write( "In all there are  30 + 50 + 75 = 155 red balls.\r\n" );
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document.write( "30 of them came from the box 1.\r\n" );
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document.write( "Therefore, the probability under the question is  P =  = .    ANSWER\r\n" );
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