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In the year 2010 in the village there were 4000 people who were literate. Every year the number of literate people increases by 400. How many people will be literate in the year 2020?
-CBSE
Class
-10
-Mathematics
-Mensuration in 3d -surface area and volumes
-Mensuration in 3d -surface area and volumes
Subtopic -

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800

8600

7600

7500

answer is C.

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Detailed Solution

Number of literate people in 2010 a = 4000
Increase in literate people every year , b= 400
So AP = 4000,4400,4800--
Number of years ,n =2020-2010=10
Formula -tn=a+(n-1) d
t10= a+(10-1)d
=4000*9*400
T10 =7600
Thus the option © is correct .

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