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Friday, 9 October

JEE Main Maths · Probability

Sum of Infinite AGP

Sum of Infinite AGP (Probability) was asked 2 times in 2 JEE Main shifts, 2021–2025, out of the 42 shifts Lumi analysed. 1 of the 2 had a numerical answer.

Times asked
2
in 2 shifts
Years
2021–2025
Usual format
Numerical value
Calculation
Pattern
Occasional
repeats across shifts

How it is asked

  • Probability from pmf requiring infinite agp sum
  • Infinite agp and gp value

Difficulty

Easy 0Medium 2Hard 0

Where it sits

Chapter: Probability. Topic: Arithmetico-Geometric Series, 6 questions over 5 ideas.

Every time it came

All 2 questions

Newest first, each with its options and official answer.

  1. 3 Apr 2025, Shift 2 · Q8If the probability that the random variable XX takes the value xx is given by P(X=x)=k(x+1)3−x, x=0,1,2,3…P(X = x) = k(x + 1)3^{-x},\ x = 0, 1, 2, 3\ldots, where…MediumSingle correct
  2. 25 Jul 2021, Shift 1 · Q84If the value of…MediumNumerical value