Solution:
As can be seen from the structure of Co2(CO)8, there are two CO bridging ligand and one Co−Co bond.

structure of Mn2(CO)10 ,there are zero CO bridging ligands
The number of bridging carbonyls respectively in Mn2(CO)10 and CO2(CO)8 are
As can be seen from the structure of Co2(CO)8, there are two CO bridging ligand and one Co−Co bond.

structure of Mn2(CO)10 ,there are zero CO bridging ligands