JEE Main · Maths · Probability
Missing or Lost Card Scenarios
JEE Main asked Missing or Lost Card Scenarios once in the 108 shifts Lumi analysed, on 4 Apr 2025, Shift 2. It belongs to Bayes' Theorem, in Probability (Maths).
Updated 2026-10-24
- Times asked
- 1
- in 1 shift
- Years
- 1 of 8
- First asked
- 2025
- the only year
- Pattern
- New since 2024
- asked once so far
Questions on this idea a shift, by year
2017–2026. Asked in 2025. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Maths questions.
Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 0 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 1 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.
How JEE Main framed it
Numerical value is the usual form. Skill tested: multi-step.
- Find n from posterior of lost card
Difficulty
1 of the 1 question had a numerical answer.
Every question
The question
From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.
Shift: 4 Apr 2025, Shift 2.
Same topic
Other ideas in Bayes' Theorem
Bayes' Theorem has 6 ideas JEE Main has asked; 3 of them came up in more than one question.
- Bayes' Theorem Application9× · 2026
- Theorem of Total Probability3× · 2026
- Implicit Equally Likely Priors2× · 2024
- Biased vs Unbiased Instrument Selectiononce · 2025
- Urn and Ball Transfer Problemsonce · 2022