A student has a test scores of 87, 89, 94 points. What must he score on the fourth exam to have an average of at least 92 points
1 answer:
You might be interested in
Answer:
The child needs a score of 37.2 to move up to the next level of the competition.
Step-by-step explanation:
The mean is the sum of all scores divided by the number of competions. So
In which S is the sum of all her scores and T is the number of competitions.
The child has five competions:
Which means that
She has to get a mean of at least 36.5, so
Her scores are: 35.5, 36.3. 36.6, and 36.9. Her last score, i am going to call x. So
The child needs a score of _____ to move up to the next level of the competition.
This score is x. So