If someone had a baby boy and the bris was pushed off until what came out to be the day of the Pidyon HaBen. Can the 2 seudas, one for the Bris and the other for the Pidyon HaBen be made together as one seudas mitzvah? Or is this a problem of being "marvin simcha b'simcha (mixing together 2 separate simchas.) Are there any sources on this?
(Related: Question of which to make first, the bris or the pidyon?)