Question

population of a city was 120000 in year 2013. next year it increased by 6%due to an epedemic it decrease by10%. what is population in 2015?

Answer 1

Answer:

114480

Step-by-step explanation:

population in 2013 = 120000

% of increase in population by 2014 = 6

population increased = 120000 + 6/100 * 120000

                                    =  120000+7200  

                                    =  127200

% of decrease in population by 2015 = 10

population decreased = 127200 - 10/100 * 127200

                                     = 114480

Answer 2

Answer-
114,480

Solution-

$population \: of \:city \: in \: 2013 \: = 120000$

$total \: decrement \: in \: 2015 = \frac{10}{100} \times 127200$

$= 12720$

$= 12720$

$growth \: of \: population \: in \: 2014 \: = 6\%$

$increased \: population \: = \frac{6}{100} \times 120000 \\ = 7200$

$total \: population \: in \: 2014 = 120000 + 7200 \\ = 127200$

$decrease \: in \: population \: in \: 2015 = 10\% \\ =$

$decrement \: in \: 2015 = \frac{10}{100} \times 127200 \\ = 12720$

$total \: population \: in \: 2015 = 127200 - 12720\\ = 114480$

Ans

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