Probability

Two Buckets, Two Black Balls

Difficulty
xxx xxxx \(xx\) xxxxx xxxxx, \(xx\) xxxxx xxxxx, xxx xxx xxxxxxx. xxxxxxxxxx xxx xxx xxxxx xxxxxxx xxx xxxxxxx, xxxxxxx xxxxxxx xxxxxx xxxxx. xxxx xxxx xxx xxxx xxxxxxxxx xx xxxxxx xxxx xxxx xxxxxx, xxxxxxxxxxxxx. xxxx xxxxxxxxxxxx xxxxxxxxx xxx xxxxxxxxxxx xxxx xxxx xxxxx xxx xxxxx, xxx xxxx xx xxxx xxxxxxxxxxx?

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