Fred must answer 7/10 questions correctly. there are 120 after answering 45 he gotten 21 correct?

First, your question should provide more explanation because if he must answer 7/10 correctly, how can he have gotten 21 correct? he only needs to answer 7 questions not 21. So if that is really the question, then I say no, he did not get 21 correct. If x: number of correct questions. Then, 7<x<10. Because he only could get 7, 8, 9, or 10 correct, not more, not less.