a fifty-fifty chance

if there is a fifty-fifty chance of something happening, it is equally likely to happen or not to happen (usually + of + doing sth) I'd say he's got a fifty-fifty chance of winning the race.

Common Names:

Name	Pronounced	Usage
Sarava	-	Various
Asher	A-shər (English)	Hebrew, English, Biblical, Biblical Hebrew
Norm	NORM	English
Eytan	-	Hebrew
Angiolo	-	Italian
Iakovu	-	Old Church Slavic