Consider the following three statements $P: 11$ is a prime number. Q: 7 is a factor of 176 . $R$ : LCM of 3…

Consider the following three statements $P: 11$ is a prime number. Q: 7 is a factor of 176 . $R$ : LCM of 3 and 7 is 21 . Then, the truth value of which one of the following statement is true?
  1. $P \vee(\sim Q \wedge R)$
  2. $(\sim P) \wedge(\sim Q \wedge R)$
  3. $(P \wedge Q) \vee(\sim R)$
  4. $(\sim P) \vee(Q \wedge R)$

Solution

$P: 11$ is a prime number $(\mathrm{T})$ $Q: 7$ is a factor of $176(\mathrm{~F})$ $R$ : L.C.M of 3 and 7 is 21 (T) Now, $P \vee(\sim Q \wedge R) \equiv \mathrm{T} \vee(\mathrm{T} \wedge \mathrm{T}) \equiv \mathrm{T}$

Asked in: MHT CET 2022 (08 Aug Shift 2)

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