950 is a handicap of 23. Although it doesn't apply for this round, a handicap level of 22 is what you would be shooting with a
recurve if you were a Grand Master Bowman. I wouldn't call that average. (edit:-sorry FF, I was writing at the same time as you)
Average could have different meanings to different people but to answer the original question, my answer (based on a handicap of 40 being pretty much average for a senior man at our club) would be:
60 yds - 250, 50 yds - 280 40 yds - 310
This adds up towards the 850 mark like Grimsby says - .......................But you will get as many different answers as the number of people you ask.