contestada

In 2015 the populations of City X and City Y were
equal. From 2010 to 2015, the population of City X
increased by 20% and the population of City Y
decreased by 10%. If the population of City X was
120,000 in 2010, what was the population of City Y
in 2010?
A) 60,000
B) 90,000
C) 160,000
D) 240,000

Respuesta :

The Population of City Y in 2010 was 160000.

Given,

In 2015,

Population of City X = Population of City Y = x

From 2010 to 2015,

Population of City X = Increased by 20%

Population of City Y = Increased by 10%

In 2010,

Population of City X = 120000

Then,

Population of City X in 2015 , x = 120000 x 120/100

                                                      = 144000

Population of City Y in 2015, x = 144000

Now,

Population of City Y in 2010 = (x) x (90/100) = 144000

                                                Therefore, x = (144000 x 100)/90

                                                                    X = 160000

That is Population of City Y in 2010 was 160000

Learn more about Population calculation here: https://brainly.com/question/16278781

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