UPSC NDA I 2013 Mathematics Paper

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Directions : For the next six(06) questions that follow:
In a state with a population of 75×106,45% of them know Hindi, 22 % know English, 18 % know Sanskrit, 12 % know Hindi and English, 8 % know English and Sanskrit, 10% know Hindi and Sanskrit and 5 % know all the three languages.
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Question : 106 of 120
 
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What is the number of people who do not know any of the above three languages ?
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