Probability
176 NDA Mathematics previous year questions (PYQs) from 19 papers, 2017 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 52 easy · 92 moderate · 32 hard.
- Most-asked subtopics: Probability via Counting (90), Conditional Probability, Total Probability, and Bayes' Theorem (31), Event Algebra — Inclusion-Exclusion, Mutually Exclusive, Exhaustive (25).
- Updated 14 September 2026.
- NDA · Sep 2026 · Q105Moderate
#1Probability via Counting
#2Probability via Counting
- Set · 3 questionsFor the next three (03) items that follow : Five numbers are randomly picked from the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and arranged them in ascending order [; being the smallest number and being the largest number selected].
- NDA · Sep 2026 · Q118Moderate
#3Probability via Counting
#4Probability via Counting
#5Probability via Counting
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#6Probability via Counting
- NDA · Apr 2017 · Q107Moderate
#7Probability via Counting
#8Probability via Counting
- NDA · Apr 2017 · Q118Moderate
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#10Probability via Counting
- NDA · Sep 2017 · Q102Moderate
#11Probability via Counting
- NDA · Sep 2017 · Q103Moderate
#12Probability via Counting
- NDA · Sep 2017 · Q111Moderate
#13Probability via Counting
- NDA · Sep 2017 · Q119Moderate
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#15Probability via Counting
- NDA · Sep 2018 · Q115Moderate
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#17Probability via Counting
- NDA · Apr 2019 · Q104Moderate
#18Probability via Counting
#19Probability via Counting
- NDA · Apr 2019 · Q111Moderate
#20Probability via Counting
- NDA · Apr 2019 · Q113Moderate
#21Probability via Counting
- NDA · Apr 2019 · Q119Moderate
#22Probability via Counting
- NDA · Sep 2019 · Q101Moderate
#23Probability via Counting
- NDA · Sep 2019 · Q102Moderate
#24Probability via Counting
#25Probability via Counting
- NDA · Sep 2019 · Q111Moderate
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#27Probability via Counting
- NDA · Apr 2020 · Q102Moderate
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- NDA · Apr 2020 · Q114Moderate
#30Probability via Counting
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#35Probability via Counting
- NDA · Sep 2021 · Q120Moderate
#36Probability via Counting
- NDA · Apr 2022 · Q101Moderate
#37Probability via Counting
- NDA · Sep 2022 · Q102Moderate
#38Probability via Counting
#39Probability via Counting
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#41Probability via Counting
#42Probability via Counting
- NDA · Sep 2022 · Q109Moderate
#43Probability via Counting
- NDA · Sep 2022 · Q111Moderate
#44Probability via Counting
- NDA · Sep 2022 · Q113Moderate
#45Probability via Counting
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#47Probability via Counting
- NDA · Apr 2023 · Q119Moderate
#48Probability via Counting
#49Probability via Counting
- Set · 1 questionFor the next five (05) items that follow: A 4-digit number is selected at random formed by using the digits 0, 1, 2, 3 and 4 (where repetition of digits is not allowed).
#50Probability via Counting
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See all 176 questionsMore chapters in this subject
- 3D Geometry94
- Application of Derivatives76
- Applications of Integration27
- Binomial Distribution31
- Binomial Theorem56
- Circles28
- Complex Numbers76
- Conics40
- Definite Integration69
- Differential Equations67
- Differentiation89
- Functions115
- Height & Distance26
- Indefinite Integration42
- Inverse Trigonometry36
- Limits & Continuity87
- Lines104
- Logarithms27
- Matrices & Determinants181
- Permutation & Combination80
- Properties of Triangle52
- Quadratic Equations67
- Sequence & Series93
- Sets & Relations75
- Statistics165
- Trigonometric Equations34
- Trigonometric Identities145
- Vectors102