Given a (finite) group $G$. Is there any bounds on the minimum number of generators $d(G)$?
For example, it is clear that $d(G) \geqslant d(G^{ab})$. Where the right hand side can be easily computed. Unfortunately, this does not give much information, e.g. $A_n^{ab}$ is trivial, but $A_n$ has two generators itself.
UPD: Actually, I am more interested in lower bounds.