the population of the town decreased by 108 °/• in 12 years . if the population was 4380000 at beginning , what is the the population after 12 years
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Answer:
Step-by-step explanation:
Let the Population in the beginning of 1998 = P
The population at the end of 1999 = 2,85,120(A)
r
1
=−12% and r
2
=+8%
∴A=P(1−
100
r
1
)(1+
100
r
2
)
⇒2,85,120=P(1−
100
12
)(1+
100
8
)
⇒2,85,120=P(
25
22
)(
100
27
)
⇒P=
22×27
2,85,120×25×25
=3,00,000
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