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awab75
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One box contains 30 green balls and 20 red balls, another Updated on: 23 Aug 2004, 16:49
Originally posted by awab75 on 23 Aug 2004, 15:30.
Last edited by awab75 on 23 Aug 2004, 16:49, edited 1 time in total.
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One box contains 30 green balls and 20 red balls, another box contains 15 green balls and 35 red balls, if Mary randomly chooses one box and draws one ball from it, what will be the probability that the ball will be green?



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abennett
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One box contains 30 green balls and 20 red balls, another 23 Aug 2004, 16:24
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0...based on your question there are no purple balls to choose.
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awab75
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One box contains 30 green balls and 20 red balls, another 23 Aug 2004, 16:50
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abennett
0...based on your question there are no purple balls to choose.
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i have corrected the mistake
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SigEpUCI
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One box contains 30 green balls and 20 red balls, another 23 Aug 2004, 17:04
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awab75
One box contains 30 green balls and 20 red balls, another box contains 15 green balls and 35 red balls, if Mary randomly chooses one box and draws one ball from it, what will be the probability that the ball will be green?
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1/2 * 3/5 + 1/2 *3/10 = 9/20



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