normal? well most 15 year olds dont even work out, so Id say something like
95 bench
95 squat
105 deadlift
for somebody who has trained hard since about middle school, maybe more like:
150 bench
180 squat
170 deadlift
really it depends on a lot of things, if those numbers are correct under in your sig, then you are a complete beast for a 15 year old