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If 1 ball is drawn from each of the boxes B1, B2, and B3, the probability that all 3 drawn balls are of the same colour is:

1. 82 / 648
2. 90 / 648
3. 558 / 648
4. 566 / 648

Correct answer: 82 / 648

Solution

The probability that all three drawn balls are of the same color is calculated by considering the probabilities of drawing three white balls or three black balls from the boxes B1, B2, and B3, and summing these probabilities gives the total probability of 82/648.

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