Statistics — NDA Previous Year Questions

73 solved PYQs · 2021–2025 · Mathematics

Solved PYQs: 73
Years covered: 2021–2025
Avg / year: ~15
Subject: Mathematics

How many NDA questions come from Statistics?

Statistics has contributed 73 questions to National Defence Academy Examination papers between 2021 and 2025 — an average of about 15 questions a year. That count is measured from EByAi’s bank of 15,695 NDA questions, not estimated from a syllabus. Every one of the 73 questions carries a written, step-by-step solution, and each is tagged to Statistics within Mathematics, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.

Sample Statistics questions from real NDA papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 73 Statistics questions (with full written solutions) are available in practice.

Question 1 · NDA 2025
The height which occurs most frequently in the class is
1. (A) $163.5 cm$
2. (B) $163.9 cm$
3. (C) $164.5 cm$
4. (D) $164.9 cm$
Show answerAnswer
$Answer: (D) 164.9 cm$
Question 2 · NDA 2025
What is the arithmetic mean of 8^2, 9^2, 10^2, ..., 15^2?
1. (A) $133.5$
2. (B) $135.5$
3. (C) $137.5$
4. (D) $139.5$
Show answerAnswer
$Answer: (C) 137.5$
Question 3 · NDA 2025
What is the total number of students whose height is less than or equal to 165 cm?
1. (A) $15$
2. (B) $39$
3. (C) $51$
4. (D) $None of the above$
Show answerAnswer
$Answer: (C) 51$
Question 4 · NDA 2025
The most appropriate graphical representation of the given frequency distribution is
1. (A) $bar chart$
2. (B) $percentage bar chart$
3. (C) $histogram$
4. (D) $pie chart$
Show answerAnswer
$Answer: (C) histogram$
Question 5 · NDA 2025
The standard deviation of 100 observations is 10. If 20 is added to each observation, then what will be the new standard deviation?
1. (A) $10$
2. (B) $15$
3. (C) $20$
4. (D) $25$
Show answerAnswer
$Answer: (A) 10$

Statistics questions by year

Year	Questions	Share of chapter questions
2025	12
2024	11
2023	12
2022	15
2021	23

Practise these 73 questions with solutions

Free to start — 25 past-year questions a day with full written solutions, no card needed.

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FAQs

How many NDA questions have been asked from Statistics?

EByAi's bank holds 73 real NDA questions from Statistics, asked between 2021 and 2025 — about 15 per year on average. Every count is measured from actual papers, not estimated.

Is Statistics important for NDA?

73 questions over 5 papers make Statistics a steady-weightage chapter in NDA Mathematics. The year-wise table above shows exactly how often it appears.

Can I solve Statistics PYQs online for free?

Yes. EByAi lets you solve NDA past-year questions in the browser with written solutions — free daily practice, no card needed.

More NDA Mathematics chapters

All NDA Mathematics chapters →NDA overview →