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The population of a village decerases at...

The population of a village decerases at the rate of 20% per annum. If is population 2 years ago was 10000 the present polulation is:(एक गांव की जनशंख्या 20 % वार्षिक की दर से घटती है। यदि 2 वर्ष पूर्व गांव की जनशंख्या 10000 थी , तो अब क्या होगी )

A

4600

B

64

C

7600

D

6000

लिखित उत्तर

Verified by Experts

(b) `20%=(1)/(5) =(1"decrease")/(5"Initial")

Hence population after two years(तक)=6400
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