in Quantitative Aptitude
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A survey is conducted among $275$ families. $100$ families among them use air condition (A.C.) $70$ families use only coolers, $60$ families use only AC and $80$ families use only fan. $10$ families use all three and $10$ families use none of these.

How many people use either a cooler or an AC?

  1. 185  
  2. 190
  3. 205  
  4. cannot be determined
in Quantitative Aptitude
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