For time:
15 pull-ups
15 sit-ups
13 pull-ups
13 sit-ups
11 pull-ups
11 sit-ups
9 pull-ups
9 sit-ups
7 pull-ups
7 sit-ups
5 pull-ups
5 sit-ups
3 pull-ups
3 sit-ups
1 pull-up
1 sit-up