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GATE CSE 2010 | Question: 59

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$25$ persons are in a room. $15$ of them play hockey, $17$ of them play football and $10$ of them play both hockey and football. Then the number of persons playing neither hockey nor football is:

  1. $2$
  2. $17$
  3. $13$
  4. $3$
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GATE CSE 2010 | Question: 3
What is the possible number of reflexive relations on a set of $5$ elements? $2^{10}$ $2^{15}$ $2^{20}$ $2^{25}$
What is the possible number of reflexive relations on a set of $5$ elements?$2^{10}$$2^{15}$$2^{20}$$2^{25}$
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