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In a Lottery, three balls are drawn (at random) from ten white balls numbered from 1 to 10, and one LotteryBall 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.

If the numbers on your ticket match at least two of the white balls or match the red LotteryBall, then you win a super prize. What is the probability that you win a super prize?

 Apr 23, 2020
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The probability is 23/80.

 May 3, 2020

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