Golf Digest hired a retired chairman of the Math. Dept. at Boston U. to calculate the odds of a hole in one using the "best available" data. Some results:
# Tour player making an ace: 3,000 to 1
# Low-handicapper making an ace: 5,000 to 1
#
Average player making an ace: 12,000 to 1
Source:
http://golf.about.com/od/faqs/f/holeinoneodds.htm
The odds of an
adult male bowling a perfect game are 1 in 11,500. Source:
http://www.newsday.com/sports/highschool/ny-skhsco...
If these two sources are correct, the odds of a golf ace vs. a perfect game of bowling are about the same for the "average" player.