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Saturday, 31 October

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JEE Main 2020 · MathsMultiple choiceSingle correctEasyConceptual

JEE Main 5 September 2020, Shift 1, Maths Q70

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

The negation of the Boolean expression

x\leftrightarrow\sim y

is equivalent to :

(1) $(x\wedge\sim y)\vee(\sim x\wedge y)$
(2) $(\sim x\wedge y)\vee(\sim x\wedge\sim y)$
(3) $(x\wedge y)\wedge(\sim x\vee\sim y)$
(4) $(x\wedge y)\vee(\sim x\wedge\sim y)$ Official answer

Official answer

Option 4

NTA final key (Sep 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.