What happens if you combine a average star with a red giant?

Answer 1

if by combine you mean two stars crash into each other, the average sized star would melt into the red giant, if by combine you mean place the average inside the red giant, the averagesize will just expand and be absorbed

Answer 2

If a red giant and an average star were to combine, they would likely form a binary system where the red giant consumes the smaller star. This process could lead to the red giant accreting mass and potentially becoming more massive and luminous. Ultimately, the fate of the system would depend on the properties and masses of the two stars involved.