First find the total number of clarinet and trumpet players: 6 players + 9 players = <<6+9=15>>15 players
Then find the total weight of the trumpets and clarinets: 15 players * 5 pounds/player = <<15*5=75>>75 pounds
Then find the total weight of the trombones: 8 players * 10 pounds/player = <<8*10=80>>80 pounds
Then find the total weight of the tubas: 3 players * 20 pounds/player = <<3*20=60>>60 pounds
Then find the total weight of the drummers: 2 drummers * 15 pounds/player = <<2*15=30>>30 pounds
Then add the weight of each type of instrument to find the total weight: 75 pounds + 80 pounds + 60 pounds + 30 pounds = <<75+80+60+30=245>>245 pounds
#### 245