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RRB NTPC Mains or Stage 2 Model Paper 3 with solutions
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© examsnet.com
Question : 32
Total: 120
The population of a town is 15000. I f the number of males increases by 8% and that of females by 10%, then the population would increase to 16300. Find the number of females in the town.
4000
6000
3000
5000
Validate
Solution:
I f number of females = a
then number of males = 15000 – a
∴
a
×
10
100
+
(
15000
−
a
)
×
8
100
= 16300 -15000
10a + 120000 – 8a = 130000
2a = 130000 – 120000
2a = 10000
a = 5000
© examsnet.com
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