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How to calculate average value?

Suppose that the wages earned by labor in last 6 days are given below.Now find out the average wages earned by labor?

Day Wages
1 600
2 700
3 800
4 600
5 800
6 700

Solution:

Sum of all numbers = 600 + 700 + 800 + 600 + 800 + 700

Sum of all numbers = 4200

Formula:

$$\text{Average}\;=$$

$$\frac{\text{Total sum of all numbers}}{\text{Total number of items}}$$

$$\text{Average}\;=\;\frac{4200}{6}$$

$$\text{Average}\;=\;700$$