The price of an article rises by 25% every odd year and falls by 20% next year. Which of the following statement is correct about the price exactly after 10 years?
A
Price would have risen by 50%
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B
The price would have fallen by 20%
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C
The price would remain as it is
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D
The price would have risen by 25%
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Solution
The correct option is C The price would remain as it is Letthepriceofthearticlebex,afteryear1,price=x+25100x=1.25x,afteryear2,price=1.25x−20100×1.25x=1.00x,Aftereachoddyear,price=1.25x,andafterevenyears1x