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Last Known Population is the population of any area of the previous year or decade. Check FAQs
Po=Pn-2-(22+12)ȳ
Po - Last Known Population?Pn - Forecasted Population? - Average Arithmetic Increase in Population?ȳ - Average Incremental Increase in Population?

Present Population given Future Population of 2 Decades by Incremental Increase Method Example

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With units
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Here is how the Present Population given Future Population of 2 Decades by Incremental Increase Method equation looks like with Values.

Here is how the Present Population given Future Population of 2 Decades by Incremental Increase Method equation looks like with Units.

Here is how the Present Population given Future Population of 2 Decades by Incremental Increase Method equation looks like.

275000Edit=350000Edit-225500Edit-(22+12)8000Edit
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Present Population given Future Population of 2 Decades by Incremental Increase Method Solution

Follow our step by step solution on how to calculate Present Population given Future Population of 2 Decades by Incremental Increase Method?

FIRST Step Consider the formula
Po=Pn-2-(22+12)ȳ
Next Step Substitute values of Variables
Po=350000-225500-(22+12)8000
Next Step Prepare to Evaluate
Po=350000-225500-(22+12)8000
LAST Step Evaluate
Po=275000

Present Population given Future Population of 2 Decades by Incremental Increase Method Formula Elements

Variables
Last Known Population
Last Known Population is the population of any area of the previous year or decade.
Symbol: Po
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Forecasted Population
Forecasted Population is the population forested usually after n decade or after n years.
Symbol: Pn
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Average Arithmetic Increase in Population
Average Arithmetic Increase in Population per decade.
Symbol:
Measurement: NAUnit: Unitless
Note: Value should be greater than 0.
Average Incremental Increase in Population
Average Incremental Increase in Population per decade. It can be positive(+ve) or negative(-ve).
Symbol: ȳ
Measurement: NAUnit: Unitless
Note: Value can be positive or negative.

Other Formulas to find Last Known Population

​Go Present Population given Future Population from Incremental Increase Method
Po=Pn-n-(nn+12)ȳ
​Go Present Population given Future Population of 3 Decades by Incremental Increase Method
Po=Pn-3-(33+12)ȳ

Other formulas in Incremental Increase Method category

​Go Future Population at End of n Decades in Incremental Increase Method
Pn=Po+n+(nn+12)ȳ
​Go Average Arithmetic Increase Per Decade given Future Population from Incremental Increase Method
=Pn-Po-(nn+12)ȳn
​Go Average Incremental Increase given Future Population from Incremental Increase Method
ȳ=Pn-Po-nnn+12
​Go Future Population at End of 2 Decades in Incremental Increase Method
Pn=Po+2+(22+12)ȳ

How to Evaluate Present Population given Future Population of 2 Decades by Incremental Increase Method?

Present Population given Future Population of 2 Decades by Incremental Increase Method evaluator uses Last Known Population = Forecasted Population-2*Average Arithmetic Increase in Population-(2*(2+1)/2)*Average Incremental Increase in Population to evaluate the Last Known Population, The Present Population given Future Population of 2 Decades by Incremental Increase Method formula is defined as the value of the present population when we have prior information of other parameters used. Last Known Population is denoted by Po symbol.

How to evaluate Present Population given Future Population of 2 Decades by Incremental Increase Method using this online evaluator? To use this online evaluator for Present Population given Future Population of 2 Decades by Incremental Increase Method, enter Forecasted Population (Pn), Average Arithmetic Increase in Population (x̄) & Average Incremental Increase in Population (ȳ) and hit the calculate button.

FAQs on Present Population given Future Population of 2 Decades by Incremental Increase Method

What is the formula to find Present Population given Future Population of 2 Decades by Incremental Increase Method?
The formula of Present Population given Future Population of 2 Decades by Incremental Increase Method is expressed as Last Known Population = Forecasted Population-2*Average Arithmetic Increase in Population-(2*(2+1)/2)*Average Incremental Increase in Population. Here is an example- 275000 = 350000-2*25500-(2*(2+1)/2)*8000.
How to calculate Present Population given Future Population of 2 Decades by Incremental Increase Method?
With Forecasted Population (Pn), Average Arithmetic Increase in Population (x̄) & Average Incremental Increase in Population (ȳ) we can find Present Population given Future Population of 2 Decades by Incremental Increase Method using the formula - Last Known Population = Forecasted Population-2*Average Arithmetic Increase in Population-(2*(2+1)/2)*Average Incremental Increase in Population.
What are the other ways to Calculate Last Known Population?
Here are the different ways to Calculate Last Known Population-
  • Last Known Population=Forecasted Population-Number of Decades*Average Arithmetic Increase in Population-(Number of Decades*(Number of Decades+1)/2)*Average Incremental Increase in PopulationOpenImg
  • Last Known Population=Forecasted Population-3*Average Arithmetic Increase in Population-(3*(3+1)/2)*Average Incremental Increase in PopulationOpenImg
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