You have 3 indistinguishable boxes, containing each one, 2 colored balls: black+black, black+white & white+white.(adsbygoogle = window.adsbygoogle || []).push({});

You open one box and, whithout seeing its interior, you take one white ball.

What is the probability of taking a second white ball from the same box?

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# Balls in boxes ( probability )

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