Question

the male:female ratio of a city is 1000:987.if the total population of the city is 2000000, what is the number of females in a city

Answer 1

2000000×987/1987=993,457.474 is female

Answer 2

Let no of males and females be x and y
The ratio of male to female is 1000:987
x/y = 1000/987
∴ x = 1000y/987 ----- 1

Total population of the city is 2000000
then x + y = 2000000
replacing x from 1
1000y/987 + y = 2000000
y(1000/987 + 1) = 2000000
y((1000 + 987)/987) = 2000000
y(1987/987) = 2000000
y = 2000000 * 987 / 1987
y = 993457