JEE Main 2020 · MathsMultiple choiceSingle correctEasyApplication

JEE Main 3 September 2020, Shift 1, Maths Q68

Question 68 of 75 in this shift, Maths question 18 of 25.

A die is thrown two times and the sum of the scores appearing on the die is observed to be a multiple of 4. Then the conditional probability that the score 4 has appeared atleast once is :

(1) $\frac{1}{3}$
(2) $\frac{1}{9}$ Official answer
(3) $\frac{1}{8}$
(4) $\frac{1}{4}$

Official answer

Option 2

NTA final key (Sep 2020).

Chapter: Probability
Topic: Conditional Probability
Idea tested: Conditioning on Dice Sums

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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.