If the cost price of Q is decreased by 10 other prices remaining same then what is the different bet...........

Quantitative Aptitude ( CCS) Bar Graph

Direction : Refer to the graphs and answer the following questions.
The first bar graph shows the marked up price of articles with respect to their cost price and the second bar graph shows the discount % given in respective articles.

If the cost price of Q is decreased by 10% (other prices remaining same), then what is the different between the new profit% and original one?

15%

10%

12%

Cannot be determined

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Explanation:

Using MP = (100+p%)/(100-d%) * CP
For article Q:
180% of CP = (100+p%)/(100-40) * CP
CP gets cancelled out, so p% = 8%
Now new CP = 90% of CP
So using MP = (100+p%)/(100-d%) * CP
180% of CP = (100+p%)/(100-40) * 90% of CP
New p% = 20%
So difference = 20 – 8 = 12%