Consider the following set of scores from a physics test. Give the mean of the scores.

Sally's numeric grade in her economics class is determined by four equally weighted hourly tests, a midterm weighted twice as much as an hourly test, and a final weighted three times as much as an hourly test. The highest score possible on each is 100.

Going into finals week, Sally's hourly test scores are 89, 85, 84, and 87, and her midterm score is 93. What must Sally make on her final at minimum in order to average 90 or more for the term?

David's course score in a chemistry course is the mean of five tests. He has scored and . What must he score on the fifth test to be assured of a course score of ?

Consider the data set

.

For what value of does this set have a mean of ?

What is the mean of the set below?

The mean of five numbers is . Give their sum.

Michael received the following scores on his last four French tests: 65, 58, 69, 58.

If his mean test score must be a 70 in the class to pass, what must he score on his fifth test?

Eric has taken four tests in his English class. His scores on the tests are 94, 87, 95, and 89. The upcoming final exam will be weighted as much as each of the previous four tests. What is the lowest score Eric can get on the final exam and still have a mean score of no less than 90?

The sum of numbers is . Find the mean in terms of . ( is a real number)

Find the mean of the following data set: