Scoring a hole-in-one is the single greatest shot a golfer can make. In the 1989 U. S. Open, four players each made holes-in-one on the sixth hole at Oak Hill Country Club. Golf Digest (1990) reports that the estimated probability of making a hole-in-one is approximately 12,780 for a professional golfer. What is the probability that these four players each make a hole-in-one on the sixth hole during the same round? What assumption do we have to make? What is the probability that none of these golfers makes a hole-in-one on the sixth hole? What is the probability that at least one of these golfers makes a hole-in-one on the sixth hole?