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Saturday, 31 October

JEE Main · Maths · Probability

Conditional Probability Definition

JEE Main asked Conditional Probability Definition 5 times in 5 of the 108 shifts Lumi analysed, in 2021 and 2022. It belongs to Conditional Probability, in Probability (Maths). The longest wait between two years asking it was 1 year. In 2021 and 2022 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked
5
in 5 shifts
Years
2 of 8
First asked
2021
last in 2022
Pattern
Occasional
across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021 and 2022. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Maths questions.

00.10.20’170’200.07’210.11’220’230’240’250’26

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 3 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

  • 20260 of 9
  • 20250 of 8
  • 20240 of 18
  • 20230 of 12
  • 20223 of 24
  • 20212 of 24
  • 20200 of 12
  • 20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Single correct is the usual form. Skill tested: calculation.

  • Probability from percentage data
  • Conditional probability given complement events

Difficulty

Easy 3Medium 2Hard 0

1 of the 5 questions had a numerical answer.

Every question

All 5 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

  1. 24 Jun 2022, Shift 2 · Q12A random variable XX has the following probability distribution: | XX | 0 | 1 | 2 | 3 | 4 | | P(X)P(X) | kk | 2k2k | 4k4k | 6k6k | 8k8k |…EasySingle correct
  2. 28 Jul 2022, Shift 1 · Q9Out of 60% female and 40% male candidates appearing in an exam, 60% candidates qualify it. The number of females qualifying the exam is…EasySingle correct
  3. 25 Jul 2022, Shift 2 · Q8If AA and BB are two events such that P(A)=13,P(B)=15P(A)=\frac{1}{3},P(B)=\frac{1}{5} and P(A∪B)=12P(A\cup B)=\frac{1}{2}, then P(A∣B′)+P(B∣A′)P(A|B')+P(B|A') is equal toEasySingle correct
  4. 31 Aug 2021, Shift 1 · Q88An electric instrument consists of two units. Each unit must function independently for the instrument to operate. The probability that…MediumNumerical value
  5. 26 Aug 2021, Shift 2 · Q78A fair die is tossed until six is obtained on it. Let X be the number of required tosses, then the conditional probability…MediumSingle correct

Shifts: 26 Aug 2021, Shift 2, 31 Aug 2021, Shift 1, 24 Jun 2022, Shift 2, 25 Jul 2022, Shift 2, 28 Jul 2022, Shift 1.

Same topic

Other ideas in Conditional Probability

Conditional Probability has 18 ideas JEE Main has asked; 5 of them came up in more than one question. The 12 most asked are below.

Topic analysisChapter analysisStudy this chapterAll repeated ideas