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JEE Main 2023 · MathsMultiple choiceSingle correctMediumMulti-step

JEE Main 12 April 2023, Shift 1, Maths Q18

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

Two dice A and B are rolled. Let the numbers obtained on A and B be

\alpha

and

\beta

respectively. If the variance of

\alpha-\beta

is

\frac{p}{q}

, where

p

and

q

are co-prime, then the sum of the positive divisors of

p

is equal to

(1) $31$
(2) $36$
(3) $48$ Official answer
(4) $72$

Official answer

Option 3

NTA final key.

Chapter: Statistics
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.