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Evaluate the sale of number of books by a book seller in the year 2018 from the given data.

Year 2014 2015 2016 2017 2018
Number of Books 1150 1115 1045 940 ?

 


1. 905
2. 870
3. 835
4. 800
5.

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Correct Answer - Option 4 : 800

Calculation:

Number of Books 1150 1115 1045 940 ?

Relation:

1150 - 1115 = 35 = 7 × 5

1115 - 1045 = 70 = 7 × 10

1045 - 940 = 105 = 7 × 15

940 - ? = 140 = 7 × 20 

? = 940 - 140 = 800

∴ Number of books sold in 2018 is 800

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