The average of 10, 25, and 70 is 10 more than the average of 15, 30, and x. What is the missing number?

What is the mean of the following data set in terms of and ?

What is the mean of the following data set in terms of and ?

The average of 10, 25, and 70 is 10 more than the average of 15, 30, and x. What is the missing number?

Find such that the arithmetic mean of is equal to the arithmetic mean of

If and , then give the mean of , , , , and .

The average of the following 6 digits is 75. What is a possible value of ?

80, 78, 78, 70, 71,

When assigning a score for the term, a professor takes the mean of all of a student's test scores except for his or her lowest score.

On the first five exams, Donna has achieved the following scores: 76, 84, 80, 65, 91. There is one more exam in the course. Assuming that 100 is the maximum possible score, what is the range of possible final averages she can achieve (nearest tenth, if applicable)?

What is the mean of this data set?

The average high temperature for the week is 85. The first six days of the week have high temperatures of 89, 76, 92, 90, 80, and 84, respectively. What is the high temperature on the seventh day of the week?