or the compound:

carbon in the middle with 3 bonds
-double bond to oxygen
-bond to Mn(CO)5
-bond to CH3 group

is the oxidation state of the metal +1?
d count 6?
total electron count 20?
coordination number 7?

2 answers

What is D count? I know that your ox state is right.
Oh, and I think that your electron count should be 24