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In the SuperLottery, three balls are drawn (at random, without replacement) from ten white balls numbered from $1$ to $10$, and one SuperBall is drawn (at random) from ten red balls numbered from $11$ to $20$. When you buy a ticket, you choose three numbers from $1$ to $10,$ and one number from $11$ to $20$.

 Aug 24, 2022
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The answer is 4/33.

 Sep 20, 2022

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