GMAT Math : Calculating arithmetic mean
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Example Questions
Example Question #2062 : Problem Solving Questions
The arithmetic mean of 
Order 
The arithmetic mean of 
Similarly,
Subtract:
so
By similar reasoning:
so
Therefore, 
Example Question #51 : Descriptive Statistics
The arithmetic mean of 
What is 
The arithmetic mean of 
This rounds to 20.
Example Question #2064 : Problem Solving Questions
Which of the following is the arithmetic mean of 
The arithmetic mean of 
Example Question #2065 : Problem Solving Questions
The arithmetic mean of 
The arithmetic mean of 
The arithmetic mean of 
Evaluate the arithmetic mean of 
The arithmetic mean of 
The arithmetic mean of 
The arithmetic mean of 
The arithmetic mean of 
Example Question #51 : Descriptive Statistics
Determine the mean for the following set of numbers.
To find the mean, simply sum up the numbers and divide by the amount of numbers.
Example Question #61 : Descriptive Statistics
Find the mean of the following set of numbers:
To find the mean, sum the numbers and divide by the quantity of numbers. Thus,
Example Question #41 : Calculating Arithmetic Mean
Find the mean of the following data set. (Round to the nearest whole number)
Find the mean of the following data set. (Round to the nearest whole number)
Finding the mean is basically like finding the average. Sum up the terms and divide by the number of terms.
Making our answer 330
Example Question #62 : Descriptive Statistics
Find the mean of the following set of numbers:
To find the mean, you must sum the numbers and divide by their quantity. Thus:
Example Question #2070 : Problem Solving Questions
Give the arithmetic mean of the set 
The arithmetic mean of a set is the sum of its elements divided by the number of elements, which here is 
the correct choice.
Example Question #41 : Calculating Arithmetic Mean
Give the arithmetic mean of 
Statement 1: A rectangle with length 
Statement 2: A rectangle with length 
EITHER STATEMENT ALONE provides sufficient information to answer the question.
STATEMENT 2 ALONE provides sufficient information to answer the question, but STATEMENT 1 ALONE does NOT provide sufficient information to answer the question.
BOTH STATEMENTS TOGETHER provide sufficient information to answer the question, but NEITHER STATEMENT ALONE provides sufficient information to answer the question.
STATEMENT 1 ALONE provides sufficient information to answer the question, but STATEMENT 2 ALONE does NOT provide sufficient information to answer the question.
BOTH STATEMENTS TOGETHER do NOT provide sufficient information to answer the question.
STATEMENT 2 ALONE provides sufficient information to answer the question, but STATEMENT 1 ALONE does NOT provide sufficient information to answer the question.
The arithmetic mean of 
From Statement 1 alone, since the area of a rectangle is the product of its length and width, we can deduce that 
Case 1:
The mean of the two is 
Case 2:
The mean of the two is 
Therefore, knowing the area of the rectangle with these dimensions is not helpful to determining their arithmetic mean.
Now assume Statement 2 alone. The perimeter of a rectangle is the sum of the lengths of the sides, so
From Statement 2 alone, the arithmetic mean can be calculated to be 25.
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