Interest Rate for a Mortgage with two borrowers (one has excellent credit, one has poor credit)?

by eyewash
Question by sam: Interest Rate for a Mortgage with two borrowers (one has excellent credit, one has poor credit)?
My credit is bad because of a divorce. I make a medium amount of money.
If I buy a house with my dad, how would the interest rate be for the mortgage (Dad has excellent credit and has a great job and lots of money), how will that affect my interest rate?
Will it give me an interest rate in the middle of what I would have gotten without him and what they would get by

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