Calculate the Average of Three Numbers

Use a function expression to define a function named calculateAverage that takes three parameters: num1, num2, and num3. The function should return the average of the three numbers.

Example 1

Input: calculateAverage(10, 20, 30);
Output: 20

Example 2

Input: calculateAverage(5, 15, 10);
Output: 10

Example 3

Input: calculateAverage(-10, 0, 10);
Output: 0

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