JEE Main 2024 · MathsMultiple choiceSingle correctEasyApplication

JEE Main 31 January 2024, Shift 1, Maths Q19

Question 19 of 90 in this shift, Maths question 19 of 30, Section A.

Two marbles are drawn in succession from a box containing 10 red, 30 white, 20 blue and 15 orange marbles, with replacement being made after each drawing. Then the probability, that first drawn marble is red and second drawn marble is white, is

(1) $\frac{4}{25}$
(2) $\frac{2}{25}$
(3) $\frac{4}{75}$ Official answer
(4) $\frac{2}{3}$

Official answer

Option 3

NTA final key.

Chapter: Probability
Topic: Conditional Probability
Idea tested: Independence Criterion

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.