Question

the ratio of male to females in a town is 7: 5 and the percentage of children among males and females is 20% and 15% respectively if number of adult females is 398650,then total population of Town is ​

Answer 1

Answer:

Let the total population be 'p'

Given ratio of male and female in a city is 7:8

In tht percentage of children among male and female is 25% and 20% repeatively.

⇒ Adult male and female % = 75% and 80$

But given adult females = 156,800

⇒ 80% (80/15)=156800

⇒ 80% ×  

15

80

​  

×100=156800

⇒p=  

80×8

15×1568×100

​  

=3,67,500

∴ Total population of the city = 3,67,500

Step-by-step explanation:

Answer 2

Answer:

Required total number of population of town is 1125600.

Step-by-step explanation:

Given,ratio of male to females in a town is 7: 5

Let, number of male in town be 7x and number of female be 5x.

It is also given percentage of children is 20% among all males.

So,number of male children

$= 20\% \: of \: 7x \\ = \frac{20}{100} \times 7x \\ = \frac{7x}{5}$

So, number of adult male

$= 7x - \frac{7x}{5} \\ = \frac{28x}{5}$

and percentage of children is 15% among all females.

So, number of female children

$= 15\% \: of \: 5x \\ = \frac{15}{100} \times 5x \\ = \frac{3x}{4}$

So, number of adult females

$= 5x - \frac{3x}{4} \\ = \frac{20x - 3x}{4} \\ = \frac{17x}{4}$

According to question,

$\frac{17x}{4} = 398650 \\ 17x = 398650 \times 4 \\ 17x = 1594600 \\ x = \frac{1594600}{17} \\ x = 93800$

Therefore total number of males are

$(7 \times 93800) = 656600$

and total number of females are$(5 \times 93800) = 469000$

Hence total population

$= (656600 + 469000) = 1125600$

This is a problem of ratio.

Know more about ratio,

https://brainly.in/question/7996583

https://brainly.in/question/7146945