In the SuperLottery, three balls are drawn (at random, without replacement) from white balls numbered from 1 to 12, and one SuperBall is drawn (at random) from red balls numbered from 13 to 20. When you buy a ticket, you choose three numbers from 1 to 12, and one number from 13 to 20.
If the numbers on your ticket match one of the three white balls and the red SuperBall, then you win a super prize. (You don't need to match the white balls in order). What is the probability that you win a super prize?