I voted for '2' because. while the group only 'officially' has one girl now, another is gonna join in this weekend.
Now, as for age demographics, just for kicks...
Including me, there are four guys who always come to all sessions; two 17 year olds (me and somebody I've been friends with since time immemorial), one 18 year old, and an almost-14-year-old. We also have three other guys who make it to about 75% of the games (18, 18, and 14 respectively; one is the 14-year-old's brother). We also have two evil 20-year-old twins who make it to about...oh, a third of the games; one is going to school on the other side of the state, and the other works a lot.
The one female 'long-time-member' of the group is 16, and (being a tolkienist) joined almost exactly a year ago when she heard about the LOTR game I was running. Her boyfriend met her through the game; the nerdiness of it still amuses both of them to no end.
The 'new girl on the block' is somebody I've known as a somewhat distant acquaintance (i.e. she went to the same 300-kid middle school) since 6th grade or so, and ended up--by chance--in the same class as in community college. She's 17 too.
Oh yeah, and the evil twins have another girl I've known for years and years in training, so she's slowly moving into the gaming circle as a whole.