The City's Population

Algebra Level 1

In a city, 60% of the population are women, 30% of the women are girls and 40% of the girls have 5-7 years old.
25% of the total of men are boys and 20% of boys have 5-7 years old. There are a total of 2000 5-7 years old boys in the city.

How many 5-7 years old girls are in the city?

Image credit: Wikipedia KTo288

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