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The total population of a village is 5000. The number of males and females increases by 10% and 15% respectively
and consequently the population of the village becomes 5600. what was the number of males in the village ?
A) 2000 B) 2500 C) 3000 D) 4000
Read Solution (Total 8)
-
- ans is (c)
because
suppose number of males =m
and number of females =f
so m+f=5000
after increase males by 10% m1=110m/100
and female by 15% f1=115f/100
and m1+f1=5600
so putting values of m1 and f1
equation become 110m+115f=560000
after solving both equations we get f=2000 and m=3000
so no of males =3000 answer is (c) - 12 years agoHelpfull: Yes(40) No(4)
- If all 5000 were men, increase in population would have been 500.
If all 5000 were women, increase in population would have been 750.
Actual increase in population =750
By alligation method,
Ratio of men to women is (750-600): (600-500) or 150:100 or 3:2
so number of males = 5000*3/5 = 3000
- 12 years agoHelpfull: Yes(12) No(4)
- x+y=5000
1.1x+1.15y=5600
- 12 years agoHelpfull: Yes(10) No(0)
- let x be male, y be female
x + y = 5000 ---> (1)
x+10%x + y+15%y =5600
x + (10/100)x + y + (15/100)y=5600
(110/100)x + (115/100)y=5600
110x+115y=560000 --> (2)
solve (1) & (2)
110x+115y= 560000 --> (2)
-110x-110y=-550000 --> (1) * -110
-------------------
5y= 10000
y= 2000
x+y =5000
y=2000 then x=3000
No. of male in the village is 3000
- 12 years agoHelpfull: Yes(8) No(1)
- take no of men=x and no. of female =y,then x+y=5000, and after increasing population 110x+115y=5600 , by solving these equation we get x=3000
- 12 years agoHelpfull: Yes(7) No(3)
- 100% = 5000, and 10% and 15% are increases so if 10% & 15% = 600.
consider that 3000 10% is 300 and 2000 15 % is 300 so we get the answer as 600. simple reverse engineering. - 6 years agoHelpfull: Yes(1) No(0)
- the total population is 5000
if we consider x as male then 5000-x as female
10% increase in male then 110x/100
15% increase in female then 115(5000-x)/100
therefore 110x/100 + 115(5000-x)/100=5600
the answer is x= 3000. - 5 years agoHelpfull: Yes(0) No(0)
- the solution to the question is 3000
- 5 years agoHelpfull: Yes(0) No(0)
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