At a meeting of 100 geniuses, each genius was either a
mathematical genius or a musical genius. At least 1 of the
math geniuses is older than age 15. If you were to choose
any 2 geniuses from the group, at least 1 of them would be
younger than 15 years of age. How many of the 100
geniuses are older than 15, and how many are younger than
15?