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  1. #1
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    Post Puzzle #450 - Two jars with marbles

    Puzzle #450 - Two jars with marbles



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  2. #2
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    Post Puzzle #450 - Two jars with marbles

    Birbal leaves one white marble in the first jar and transfers the rest to the second jar. The probability of drawing a white marble from the first jar is 1 (100%). The probability of drawing a white marble from the second jar is 49/99.
    Given that either of the two jars is equally likely to be picked up, the combined probability is (0.5 x 1) + (0.5 x 49/99) = 74/99. That's a 74.75% chance of drawing a white marble.

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