Respuesta :
Answer:
certain
Explanation:
Random is to pick randomly which is a guess. Certain is to be sure.
Systematic is the opposite of random.
What are opposites?
A word that expresses a meaning that is diametrically opposed to the meaning of another word; in this case, the two words are antonyms.
Therefore, Systematic is the opposite of random.
To learn more about opposites, refer to :
https://brainly.com/question/12427791
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