Answer:
1,147 times
Step-by-step explanation:
15 jumping jacks per set. 25 sets = 25 × 15 = 375
20 sit-ups per set. 20 sets = 20 × 18 = 360
12 push-ups per set. 21 sets = 21 × 12 = 252
10 pull-ups per set. 16 sets = 16 × 10 = 160
375 + 360 + 252 + 160 = 1147