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In a town, 80 % of the population are adults of which the men and women are in the ratio of 9 : 7, respectively. If the number of adult women is 4.2 lakh, what is the total population of the town?

A) 12 lakh
B) 9.6 lakh
C) 9.8 lakh
D) 11.6 lakh

Correct Answer:

A) 12 lakh

Description for Correct answer:

Let the number of adult men be x.
Then , ratio of the numbers of adult men and adult women

9 : 7 = x : 4.2

X = \( \large\frac{9}{7}\times 4.2 = 5.4 lakh \)

Total adult population = 4.2 + 5.4 = 9.6 lakh

If the population of the town be y lakh, then

\( \large\frac{80y}{100} = 9.6\)

Y = \( \large\frac{9.6 \times 100}{80} = 12 lakh \)

Part of solved Ratio and Proportions questions and answers : >> Aptitude >> Ratio and Proportions

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