Question

In order to earn an A in her math course,

Bernadette must have an average of at
least 90 on her exam scores. She has
grades of 83, 97, 89, and 82 on her first 4
exams. What is the minimum she can
score on the final exam to earn an A in the
course?​

Answer 1

Explanation:

Let minimum score on the final exam to earn an A be X

`mean \: = (sum \: of \: observation)/(number \: of \: observation)`

`90 = (83 + 97 + 89 + 82 + x)/(5)`

Further solving :

X = 99 marks