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A discount of 15% on one article is same as a discount  of 20% on another article .The costs of  two article can be:

Options:
A .  Rs 40, Rs 20
B .  Rs 60, Rs 40
C .  Rs 80, Rs 60
D .  Rs 60, Rs 40
E .  None of these
Answer: Option C
 -    Let the costs of the two articles be x and y. Then,
  15% of x = 20% of y
  => x/y = 20/15 = 4/3
  So,x and y must be in the ratio of 4:3

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