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1. The price of apple in the year 2010 has increased by 15% from that of the previous year.In 2011 the price has previous year. In 2011 the price has decreased by 10% .In 2011, what was the increase in price respect to that of 2009?

  • A. 3.5%
  • B. 3.5%
  • C. 3.5%
  • D. 3.5%

Answer: Option A

Explanation:

Here ,

Increase x =15% (+)

Decrease y = 10% (-)

We know 

= x±y± xy/100

= 15-10- (15x10)/100

= 5-1.5

= 3.5%

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