This is a question about US law. I realize there might be some differences across states.
Suppose I have a $3 million IRA with my friend Nellie listed as the beneficiary. Nellie is also mentioned in my will, which specifies that she is to receive a $7 million bequest. (Suppose also that my non-retirement assets are more than sufficient to cover this.)
Does Nellie receive the $3 million IRA PLUS $7 million, for a total of $10 million? Or does she receive the $3 million IRA plus $4 million (i.e. $7 million altogether)?