In city A, there are 20,000 people in total, and 30% of them are under the age of 15. Among the work age population, there are 4000 people working full time, and 3000 people working part time. The rest are not working. Among the population that's not working, 80% of them are actively seeking for a job, whereas the rest of them are not doing so. Please calculate the following for city A

Sure, let's break this down step by step:

1. First, let's find out how many people are under the age of 15. Since 30% of the total population is under the age of 15, we multiply 20,000 (the total population) by 30% (or 0.30 in decimal form).

   20,000 * 0.30 = 6,000

   So, there are 6,000 people in city A who are under the age of 15.

2. Next, let's find out how many people are of working age. We do this by subtracting the number of people under the age of 15 from the total population.

   20,000 (total population) - 6,000 (people under 15) = 14,000

   So, there are 14,000 people of working age in city A.

3. Now, let's find out how many people are not working. We know that 4,000 people are working full time and 3,000 people are working part time. So, we add these two numbers together and subtract the result from the total working age population.

   14,000 (working age population) - 4,000 (full time workers) - 3,000 (part time workers) = 7,000

   So, there are 7,000 people of working age in city A who are not working.

4. Finally, let's find out how many of the non-working people are actively seeking a job. We know that 80% of the non-working population is actively seeking a job, so we multiply 7,000 (the non-working population) by 80% (or 0.80 in decimal form).

   7,000 * 0.80 = 5,600

   So, there are 5,600 people in city A who are not working but are actively seeking a job.

And that's it! We've calculated all the numbers you asked for.