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9 October, 19:35

15 balls are in bag of red and blue balls if 6 is red how many red balls must be added to bag so that probability is 2:3

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  1. 9 October, 19:43
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    I think 12 is the correct answer
  2. 9 October, 19:45
    0
    Answer: 12 red balls must be added

    Step-by-step explanation:

    Starting out with 15 balls, 6 red implies 9 blue. If blue remains 9, then we expect red to be 18 for a probability at 2/3. 18-6 = 12
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