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Previous year question hub

Probability - General Aptitude (GA) Previous Year Questions

Practice Probability - General Aptitude (GA) previous year questions organised from real papers, with year-wise coverage and clear topic navigation.

4Papers
4Years
12Questions
1Topics

Probability question pattern

Every graph below is calculated only from this selection.

Questions by year

Compare question counts across years.

Difficulty distribution

How the classified questions are distributed by difficulty.

Easy 7 58.3%
Medium 5 41.7%

Question type distribution

MCQ, numerical, multiple-select and other formats found in these papers.

MCQ 7 58.3%
Numerical Answer Type (NAT) 5 41.7%

Subject weightage

Top subjects by unique question coverage.

General Aptitude (GA)
12 Qs

Most asked topics

Top topics across the included previous year papers.

Probability
12 Qs

Subtopic coverage

Top subtopics inside this exact selection.

Elementary Statistics
12 Qs

Paper coverage

Question coverage for the most populated papers. Every active PYP paper remains listed below.

Ecology and Evolution (EY) 2026
2 Qs
Ecology and Evolution (EY) 2021
1 Qs
Ecology and Evolution (EY) 2017
3 Qs
Ecology and Evolution (EY) 2015
6 Qs

Browse by subtopics

Open a focused page built from the same verified paper data.

Elementary Statistics

Explore previous-paper coverage, trends and focused practice for Elementary Statistics.

12 questions4 papers4 years

Included previous year papers

Newest papers appear first. Search these papers or sort by year and name.

Paper nameYearPDFAttempt
Ecology and Evolution (EY) 20262026
2 questions in this view		2026
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20212021
1 questions in this view		2021
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download Official answer keyOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20172017
3 questions in this view		2017
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download
Ecology and Evolution (EY) 20152015
6 questions in this view		2015
ExamElite PDFs
ExamElite solutions
Official documents
Official question paperOriginal authority-issued PDF Official Download

Sample previous year questions

A varied preview from the papers represented in this selection, with every available option.

1
2015 · General Aptitude (GA) · Probability · Elementary Statistics
Ecology and Evolution (EY) 2015

Maximum heterozygosity (in decimal notation, not in fractions or percentage) at a neutral locus with two alleles, given random mating, is ________

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2
2021 · General Aptitude (GA) · Probability · Elementary Statistics
Ecology and Evolution (EY) 2021
Let \(X\) be a continuous random variable denoting the temperature measured. The range of temperature is \([0, 100]\) degree Celsius and let the probability density function of \(X\) be \(f(x) = 0.01\) for \(0 \leq X \leq 100\).
The mean of \(X\) is ______
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3
2017 · General Aptitude (GA) · Probability · Elementary Statistics
Ecology and Evolution (EY) 2017
In a population, the frequency of genotypes at a locus are A1A1 = 0.16, A1A2 = 0.48, A2A2 = 0.36. The probability of fixation of the A1 allele by genetic drift is ______________.
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4
2026 · General Aptitude (GA) · Probability · Elementary Statistics
Ecology and Evolution (EY) 2026
A day can only be cloudy or sunny. The probability of a day being cloudy is 0.5, independent of the condition on other days. What is the probability that in any given four days, there will be three cloudy days and one sunny day?
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5
2015 · General Aptitude (GA) · Probability · Elementary Statistics
Ecology and Evolution (EY) 2015

A predator encounters a group of 10 prey and kills one of them to feed. The probability of getting killed is the same for all prey individuals. The probability that a given prey is killed by the predator is ________

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6
2017 · General Aptitude (GA) · Probability · Elementary Statistics
Ecology and Evolution (EY) 2017
An experimentalist rejects a null hypothesis because she finds a \(p\)-value to be 0.01. This implies that :
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