In a certain year, the population of a certain town was 9000. If in the next year the population of males increases by 3% and that of the females by 9% and the total population increases to 9600, then what was the ratio of population of males and females in that given year?
Choose the correct choice from the following options:
A) 7 : 11 B) 5 : 4 C) 2 : 3 D) Data inadequate E) None of these
Let the population of males = x; then the population of females = 9000 – x   Now, 3% of x + 9% of (9000 – x)   = (9600 – 9000 ) = 600   or 0.03x + 720 – 0.09x = 600   or 720 – 600 = 0.09x – 0.03x   or, 120 = 0.06x   x = 3500   Reqd ratio of population of males and females   3500/9000−3500=3500/5500=7:11   7 : 11nswer 7 : 11
<result>A</result>
In a certain year, the population of a certain town was 9000. If in the next year the population of males increases by 3% and that of the females by 9% and the total population increases to 9600, then what was the ratio of population of males and females in that given year?