Statistics and Probability – NDA Previous Year Questions (2020–2023)
All 117 NDA previous-year questions from Statistics and Probability (Maths), 2020–2023, taken from 6 papers. Practise them together in one test with the official marking and answer key, then review every answer.
▶ Practise all 117 questionsAll NDA chapters
Statistics and Probability questions by paper
| Paper | Questions |
|---|---|
| NDA 2023 (I) Paper I Maths | 19 |
| NDA 2023 (II) Paper I Maths | 20 |
| NDA 2022 (I) Paper I Maths | 20 |
| NDA 2021 (I) Paper I Maths | 18 |
| NDA 2021 (II) Paper I Maths | 20 |
| NDA 2020 (I & II) Paper I Maths | 20 |
Sample questions
- NDA 2023 (I) Paper I Maths
The mean and variance of five obser vations are 14 and respectively Three of the five observations are 11 16 and 20 What are the other two observations a 8 and 15 9 and… - NDA 2023 (I) Paper I Maths
Let A and be two independent events such that A AUB 08 What is the value of by 4 2 3 a 4 5 - NDA 2023 (I) Paper I Maths
A biased coin with the probability of getting head equal to 4 is tossed five times What is the probability of getting tail in all the first four tosses followed by head… - NDA 2023 (I) Paper I Maths
A coin is biased so that heads comes up thrice as likely as tails In four independent tosses of the coin what is probability of getting exactly three heads 81 a 256 27…
Question text shown from the scanned paper; open the test to see each question exactly as printed.