A man sells an article at a profit of 19%. If the had bought it at 30% less and sold it for Rs.42 less, he would have gained 50%. Find the cost price of the article
1). Rs. 210
2). Rs. 70
3). Rs. 140
4). Rs. 300

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• Consider the following code fragment
  void foo(int x, int y)
  {
  x+=y;
  y+=x;
  }
  main()
  {
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  foo(x,x);
  }
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  (B) 5 and 12
  (C) 5 and 20
  (D) 12 and 20
  
  

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  (C) key and ordering
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