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JEE Main 20203 SeptemberEvening Shift
Exam
JEE Main
Year
2020
Date
3 September
Shift
Evening Shift
Subject
Mathematics
Chapter
Mathematical Reasoning

JEE Main 2020 · 3 September · Evening Shift · Mathematics · Mathematical Reasoning

Let p, q, r be three statements such that the truth value of (p ∧...

Let p,q,rp, q, r be three statements such that the truth value of \left(p ∧ q\right) \to \left(~ q ∨ r\right) is FF . Then the truth values of p,q,rp, q, r are respectively :

Options

  1. AT,T,FT, T, F
  2. BT,T,TT, T, T
  3. CT,F,TT, F, T
  4. DF,T,FF, T, F

Correct answer

A. T,T,FT, T, F

Step-by-step solution

Given that the truth value of (p∧q)→( q∨r)\left(p ∧ q\right) \to \left(~ q ∨ r\right) is FF .

For the above truth value to be possible, \left(p ∧ q\right)shouldbeTRUEand( q∨r)should be TRUE and \left(~ q ∨ r\right) should be FALSE.

\left(p ∧ q\right)isTRUEwhenis TRUE whenp \text{ and } qbothareTRUE.</p><p>( q∨r)both are TRUE.</p><p>\left(~ q ∨ r\right) is FALSE when qq is TRUE and rr is FALSE.

So, the truth values of p,q,rp, q, r are T,T,FT, T, F respectively.

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