kirsten calculated the mean of 10 quiz scores. later she was told there was an error in grading one of her quizzes. a quiz score of 79 was revised to 89. how will this grading revision affect the calculated mean of kirstens quiz scores?

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.