Meaning of “mix” - Learner’s Dictionary

mix

noun uk us /mɪks/
COMBINATION [ C ]

B1 a combination of things or people, often in a group:

[ usually singular ] There's a good mix of nationalities in the class.
POWDER [ C, U ]

a powder to which you add liquid in order to make something:

cake mix

(Definition of “mix noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)