In the smallstate lottery, three white balls are drawn (at random) from twenty balls numbered 1 through 20, and a blue superball is drawn (at random) from ten balls numbered 21 through 30. when you buy a ticket, you select three numbers from 1-20 and one number from 21-30. to win a prize, the numbers on your ticket must match at least two of the white balls or must match the superball.
if you buy a ticket, what is your probability of winning a prize?

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