What is the formula for Arithmetic Mean?

A. (a + b) / 2
B. (a – b) / 2
C. (a + b)
D. (a – b)

Arithmetic mean, also known as the average, is a common measure used in mathematics and statistics. What is the correct formula for calculating the arithmetic mean?

Explanation:

The correct formula for calculating the arithmetic mean is (a + b) / 2. To find the mean of two numbers, you add the numbers together and divide the sum by 2.
Option B – (a – b) / 2 is not the formula for calculating the arithmetic mean. This formula represents a different mathematical operation.

Options C and D – (a + b) and (a – b) respectively, do not involve the division by 2, which is necessary for finding the average.

In conclusion, the correct formula for calculating the arithmetic mean is (a + b) / 2.