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Saturday, 31 October

JEE Main 2020 · MathsMultiple choiceSingle correctMediumApplication

JEE Main 8 January 2020, Shift 2, Maths Q70

Question 70 of 75 in this shift, Maths question 20 of 25, Section A.

Which of the following statements is a tautology ?
  1. (1)p∨(∼q)→p∧qp \vee (\sim q) \to p \wedge q
  2. (2)∼(p∨∼q)→p∧q\sim(p \vee \sim q) \to p \wedge q
  3. (3)∼(p∧∼q)→p∨q\sim(p \wedge \sim q) \to p \vee q
  4. (4)∼(p∨∼q)→p∨q\sim(p \vee \sim q) \to p \vee qOfficial answer

Official answer

Option 4

NTA final key (Jan 2020).

Chapter
Mathematical Reasoning
Topic
No close match in our taxonomy
Idea tested
No close match in our taxonomy

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.