Answer:
18 attendees
Step-by-step explanation:
40-12 = 28
28-12 = 16
16-12 = 4
That's the lowest she can go. So there are only three 12's there so you multiply the 6 by 3.
6*3 = 18 attendees
▓ Sorry if this makes no since, I'm tired right now. I hope you can understand my sloppy writing. ▓