Average of Three Numbers Flowchart

Overview

In this post, we will model a flowchart to find the average of three numbers. In general, the average of n numbers is computed as:

$\LARGE average = \frac{sum}{n}$

$\huge Average = \frac{\sum_{i=1}^{n} x_{i}}{n}$

sum = Sum of n numbers

Here, to calculate the average of three numbers n = 3

Example

Let’s compute the average of the three numbers by hand. Let the three numbers be n1, n2, and n3.

For example, let’s assume the numbers are as follows:

n1= 31,

n2 = 43

n3 = 97.

In the first step, we need to compute the sum of the three numbers.

sum = 31 + 43 + 97

= 171

In the second step, we need to compute the average of the three numbers.

Average = 171/ 3

= 57

IPO chart

IPO chart for the average of three numbers flowchart

Input

Process

Output

Three numbers n1,n2,n3

AverageOfThree = (n1 + n2 + n3)/3

Output displayed by the flowchart

AverageOfThree

Pseudocode

RAPTOR Flowchart

We will prompt the user to enter three numbers. In the flow chart, we will compute the average of the user-entered numbers. In the end, will display the result i.e average of the three numbers.

Let the numbers are: n1, n2, and n3

We will store the average in the variable: averageOfThree

Prompt the user with the numbers.

Average Of Three Numbers

Drag and drop the three Input symbols to the workspace.
Compute the average :
average = (n1 + n2 + n3 ) /3
Drag and Drop the Assignment symbol. Perform the computation.
Display the average.
Drag and drop the output symbol and print the result.
Execute the flow chart.

Flowchart Output

Let’s execute a sample test case to test the output of the flowchart. The flowchart should be tested and the output should be validated for proper working.

Test Case Scenario

Detailed Steps

Test Data

Expected Result

Actual Result

Add three numbers.

Launch Raptor.

Execute the flowchart.

Enter three numbers as input.

Run the flowchart and enter the three numbers.