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Question

The cost of a dozen of ink pens is Rs 180 and the cost of 8 ball pens is Rs 56. Find the ratio of the cost of an ink pen to the cost of a ball pen.


  1. 15:7

  2. 7:15

  3. 3:18

  4. 2:18


Solution

The correct option is A

15:7


Cost of a dozen ink pens (12 pens) = 180
Cost of 1 ink pen = 18012 = Rs 15
Cost of 8 ball pens = Rs 56
Cost of 1 ball pen = 568 = Rs 7
The ratio of cost of one ink pen to that of one ball pen = 157 = 15:7

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