Distribution

100
100        
100        
100        
 99        
 99        
 98        
 98        
 98        
 97        
 97          89
 97          89                                    
 97          89                                    
 97          89    84                                
 97          88    83                                
 97          88    82    79                            
 96          88    82    79                            
 96    93    87    81    79                            
 96    93    86    81    78                            
 96    91    86    81    78                            
 95    90    86    81    77                            
 95    90    86    80    76    73    68                    
 95    90    85    80    75    70    68    63    54            
 95    90    85    80    75    70    67    63    53    48    42    32

Mean: 84, Median 86

Problem 1

Problem 2

Problem 3

Problem 4

Problem 5

Problem 6

A common solution based on balancing moments.

A similar solution approach, but this time moving one of the 20 K forces rather than the 10 K forces.

An unusual approach based on balancing resultant vectors: