In regards to title IX. Does there have to be an equal number of men's and women's sports in a college or university athletic department?

No.

While Title IX mandates that nobody shall be denied participation or discriminated against, on basis of gender, by any educational program that receives Federal monies there is nothing in the Wording that states there must be an equal number of sports for men and women.

Title IX governs opportunity as a whole and not on an individual basis. The school has the right to choose what sports they will participate in based on student interest, budget, and ratio of men v. women enrollment. If a school's ratio of male to female athletes is close to the ratio of male to female undergraduates, the school is in compliance with Title IX.

Title IX does not require that equal monies be spent on both men and women sports but that equal treatment be given. This goes down to aspects that may not be considered 'sport'. If one gender's athletic teams receive letter jackets, the other gender's athletic teams must also be given letter jackets. If one gender's athletic teams regularly have cheerleaders and/or the band attend games, the other gender's athletic teams must also be given this consideration.