50/50 girl
n.β Β«He stands in the Hall of Flags in front of the young women selling charity raffle ticketsβoften called the “50-50 girls,” for the distribution of the raffle proceeds: half to the winner, half to charity.Β» ββGolden Gloves” by Kathleen Burge Boston Globe Feb. 22, 2009. (source: Double-Tongued Dictionary)