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Mathematics, 09.02.2020 18:58 love0000

A box contains balls numbered 1 through 9. We randomly pick a ball, put it back in the box, and then pick a second ball.

What is the probability that the two balls have the number 1 on them?

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A box contains balls numbered 1 through 9. We randomly pick a ball, put it back in the box, and then...

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