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Saturday, 31 October

JEE Main 2021 · MathsMultiple choiceSingle correctHardMulti-step

JEE Main 22 July 2021, Shift 2, Maths Q73

Question 73 of 90 in this shift, Maths question 13 of 30, Section A.

Four dice are thrown simultaneously and the numbers shown on these dice are recorded in 2×22\times2 matrices. The probability that such formed matrices have all different entries and are non-singular, is :
  1. (1)45162\frac{45}{162}
  2. (2)2281\frac{22}{81}
  3. (3)2381\frac{23}{81}
  4. (4)43162\frac{43}{162}Official answer

Official answer

Option 4

NTA final key.

Chapter
Probability
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.