# ISEE Middle Level Math : How to find mean

## Example Questions

### Example Question #1 : How To Find Mean

On the first four exams, Charley scored 92, 88, 76, and 74. Charley wants to have a test average of 85%.  What must Charley score on the fifth exam to average 85%?

82%

100%

90%

95%

85%

95%

Explanation:

The summation of the first four exams equals 330.  Using the equation for average, Charley needs to get a 95 on the last exam.

### Example Question #2 : How To Find Mean

Give the mean of the following data set:

Explanation:

Since there are 16 elements, divide their sum by 16 to get the mean:

### Example Question #3 : How To Find Mean

Find the average of this set of numbers:

521, 834, 754, 902, 899

Explanation:

First, add all the numbers in this set:

Divide, 3910 by the total amount of numbers in the set:

### Example Question #1721 : Grade 6

Adrienne is trying on dresses for prom. The dresses she likes each cost , ,  and , respectively. What is the average dress price that Adrienne is considering?

Explanation:

First, add up all of the dress prices:

Then, divide by the number of dresses:

Answer: The average dress price is

### Example Question #2 : Find Mean

Find the average of this set of numbers:

2521, 2512, 2525, 2552, 2551, 2525, 2517

Explanation:

First, add all the numbers in this set:

Then, divide by the amount of numbers in the set:

In my town, a gallon of milk costs $3.21,$3.39 and $3.51 in three different stores. What is the average price of a gallon of milk in my town? Possible Answers: Correct answer: Explanation: First, add all of the prices: Then divide, that amount by 3 (number of stores in town): Answer: The average price of a gallon of milk is ### Example Question #4 : How To Find Mean In my town, a gallon of gas costs$3.47, $3.79 and$3.60 in three different stations. What is the average price of a gallon of gas in my town?

Explanation:

First, add all of the prices:

Then, divide by 3 (total number of stations)

Answer: The average price for a gallon of gas in my town is

### Example Question #2 : How To Find Mean

Find the mean in this set of numbers:

3343, 4434, 4334, 3343, 4343, 3434, 3334

Explanation:

First, add all the numbers in this set:

Then, divide by 7 (the amount of numbers in this set):

### Example Question #15 : How To Find Mean

Find the mean for this set of numbers:

6366, 6336, 6366, 6633, 6333, 6363, 6669

Explanation:

First, add all the numbers in the set:

Then, divide by the total amount of numbers in the set:

### Example Question #4 : How To Find Mean

Felicia ran three races as a member of the track team. The races were 1000 meters, 2000 meters and 1800 meters, respectively. What was the average distance of the 3 races?