JEE Main 2020 — Probability Question with Solution
From: JEE Main 2020 (Online) 3rd September Morning Slot
Question
A dice 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 :
Choose an option
Show full solutionCorrect option: B
Correct answer
B
Step-by-step explanation
Let A is the event for getting score a multiple
of 4.
So, A = { (1, 3), (3, 1), (2, 2), (2, 6), (6, 2), (3, 5), (5, 3), (4, 4), (6, 6) } = 09
n(A) = 9
B : Score of 4 has appeared at least once.
B = {(4, 4)}
So, Required probability =
So, A = { (1, 3), (3, 1), (2, 2), (2, 6), (6, 2), (3, 5), (5, 3), (4, 4), (6, 6) } = 09
n(A) = 9
B : Score of 4 has appeared at least once.
B = {(4, 4)}
So, Required probability =
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This is a previous-year question from JEE Main 2020, covering the Probability chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.