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Saturday, 31 October

JEE Main 2021 · MathsMultiple choiceSingle correctEasyCalculation

JEE Main 27 August 2021, Shift 2, Maths Q78

Question 78 of 90 in this shift, Maths question 18 of 30, Section A.

Each of the persons A and B independently tosses three fair coins. The probability that both of them get the same number of heads is :
  1. (1)58\frac{5}{8}
  2. (2)18\frac{1}{8}
  3. (3)516\frac{5}{16}Official answer
  4. (4)11

Official answer

Option 3

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.