Question

In a city 30% are females ,40% are males and number of children are 1200.find the total population

Answer 1

Answer:

total population will be 4000

Step-by-step explanation:

3x/10 + 4x/10 +1200 =X

7x +12000/10 =x

12000+7x =10x

3x=12000

X=4000

Answer 2

Answer:

females=30%

males=40%

children=((100-(40+20))

=30%

then we knows the number of children= 1200

we think x is the total number population

30x%=1200

x=1200×10/3

x=400×10

x=4000

total population=4000

females number=1200

males number= 4000×40/100

= 40×40

=1600