The ratio of male and female in a city is 7 8 respectively and percentage of children among male and...........

Quantitative Aptitude ( CCS) Ratio, Proportion

The ratio of male and female in a city is 7 : 8 respectively and percentage of children among male and female is 25 and 20 respectively. If number of adult females is 156800, what is the total population of the city?

400000

386400

367500

412300

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Explanation:

Solution:
Let the total population be ‘p’
Male :Female 7 : 8
Percentage of children among male and female is 25% and 20%
Then Adults male and female % = 75% & 80%
=> 80%(8p/15) = 156800
=> 80 x 8p/15 x 100 = 156800
=> p = 156800 x 15 x 100/80 x 8
=> p = 367500
Therefore, the total population of the city = p = 367500.