Final answer:
The average monthly income of these 400 employees is calculated by summing the total income of all employees and dividing by the total number of employees, which yields an average monthly income of 730 dinars.
Step-by-step explanation:
To determine the average income of all 400 employees, we first need to find the total income of all employees. The total income is the sum of the income of the 140 employees earning an average of 1250 dinars and the income of the other 260 employees earning 450 dinars. This can be calculated as follows:
- (140 employees * average income of 1250 dinars per employee) = 175,000 dinars
- (260 employees * average income of 450 dinars per employee) = 117,000 dinars
You then add these sums together to get a total income of 292,000 dinars for all 400 employees. Then you divide this sum by the total number of employees which is 400:
(292,000 dinars ÷ 400 employees = 730 dinars)
Therefore, the average monthly income for these 400 employees is 730 dinars.
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