Can you use 50% Exp Rune if you are a mentee?

I got a 50% EXP Rune as part of the compensation, but will I get an additional 50% exp if I use it while I have mentor buffs? I don't want to waste it.

I got a 50% EXP Rune as part of the compensation, but will I get an additional 50% exp if I use it while I have mentor buffs? I don't want to waste it.

Yes