Averages & Mixtures — PPSC previous year questions

All 24 Averages & Mixtures questions the Punjab PSC asked between 2018 and 2026, each with a worked answer and the exam it came from. First 10 free to read.

Questions: 24
Years covered: 2018–2026
Papers: 36
Repeated: 3

3 of these 24 were set in more than one exam — the Commission reuses this topic, which is the argument for working through it rather than skimming it.

The 10 it asks most

Free to read, with the worked answer and the exam each one came from. The book prints this topic in the order the Commission favours, so these are the ones to know first.

1141.A wheat merchant has four varieties of wheat – A, B, C, D with him. He mixed the entire quantity of the wheat of varieties A and B with him. With this mixture, if he mixes the entire quantity of wheat of variety C, which costs ₹ 20 per kg, the mixture so formed would cost ₹ 25 per kg. Instead, if he mixes with it the entire quantity of wheat of variety D, which costs ₹ 36 per kg, the mixture so formed would cost ₹ 31 per kg. If the entire quantity of wheat of variety D is thrice that of wheat of variety C, how much (in ₹) would the mixture of the entire quantity of wheat of all 4 varieties cost#

Punjab Civil Services (Prelims) — CSAT 2025Agriculture Development Officer 2024asked 2×

A₹ 29.5 per kg
B₹ 28 per kg
C₹ 30.5 per kg
D₹ 26.5 per kg

1142.The average height of 5 people in a room is 160 cm. A sixth person with height 172 cm enters the room. The average height of the 6 people in the room is#

Sub Divisional Officer (Civil) (Group-A) and 01 Post of Sub Divisional Officer (… 2024Inspector, Cooperative Societies 2022asked 2×

A166 cm
B164.50 cm
C163.33 cm
D162 cm

1143.The average contribution of 5 men to a fund is Rs. 35. Sixth man joins and pays Rs. 35 more than the resultant average of 6 men. Find the total contribution of all 6 men.#

Deputy Controller 2018Scientific Assistant Toxicology 2018asked 2×

ARs. 210
BRs. 245
CRs. 250
DRs. 252

1144.If the average of 30 numbers is zero, how many numbers may be greater than zero?#

PPSC DDSWO 2026

1145.In a 70 litre mixture of two liquids A and B, liquid B is 10%. How much quantity of liquid B to be added in the mixture so that the quantity of liquid B in the net mixture becomes 25%?#

Remote Sensing and Geographic Information System Officer (Group-B) 2025

A21 litres
B14 litres
C17.5 litres
D16.5 litres

1146.In what ratio water should be added to milk to gain 20% by selling the mixture at price of pure milk?#

Assistant Research Officer (Group-A) 2025Research Officer (Group-A) 2025

A1 : 4
B1 : 6
C2 : 5
D1 : 5

1147.Out of the three given numbers, the first number is twice the second and thrice the third. If the average of the three numbers is 121, what is the difference between the first and the third number ?#

Punjab Civil Services (Prelims) — CSAT 2025

A144
B77
C99
D132

1148.The average monthly salary of 16 workers is ₹ 800. The salary of the manager is also included then average monthly salary is increased by ₹ 50. What is the monthly salary of the manager?#

Archaeological Chemist(Group-B) 2025

A₹ 2650
B₹ 1400
C₹ 2000
D₹ 1650

Directions

Study the following information to answer the question given below.

I. In a group of 8 boys, 2 boys aged at 21 and 23 were replaced by two new boys. Due to this the average age of the group increased by 2 years. “x” is the average age of 2 new boys.
II. 3 years ago, the average age of A, B and C was 27 years. Also, 5 years ago, the average age of B and C was 20 years. “y” is the present age of A

1149.What is the ratio between x and y ?#

Punjab Civil Services (Prelims) — CSAT 2025

A2 : 3
B3 : 4
C3 : 5
D4 : 5

1150.Find the largest number among the three numbers if the average of those numbers is 25 and the ratio of the numbers is 4:5:6#

Veterinary Officer 2024

Solutions

10 answers · same numbers

1141.(A) ₹ 29.5 per kg

Let the A+B mix weigh m kg at ₹p per kg and variety C weigh c kg (so D weighs 3c). > With C: m(p − 25) = 5c; with D: m(31 − p) = 15c > Dividing: (p − 25)/(31 − p) = 1/3, so p = 26.5 and m = 10c/3 > All four: (10c/3 × 26.5 + 20c + 108c) ÷ (10c/3 + 4c) = 29.5 The full mixture costs ₹29.5 per kg.

1142.(D) 162 cm

Total height of the five = 160 × 5 = 800 cm; with the sixth person the total is 800 + 172 = 972 cm. > New average = 972 ÷ 6 = 162 cm Shortcut: the newcomer is 12 cm above the old average, and 12 spread over 6 people raises the average by 2 cm.

1143.(D) Rs. 252

Let the sixth man pay Rs. x. The five men together gave 5 × 35 = Rs. 175. > x = (175 + x)/6 + 35 > 6x = 175 + x + 210 → 5x = 385 → x = 77 > total = 175 + 77 = 252 So the six men contributed Rs. 252.

1144.(D) 29

If the average of 30 numbers is 0, their sum is 0. At most 29 numbers can be positive, with the single remaining number negative enough to cancel their sum (e.g., 29 ones and one -29). All 30 cannot be positive, as the sum would then exceed zero. Among the options, the maximum possible is 29.

1145.(B) 14 litres

Liquid B in the mixture = 10% of 70 = 7 litres. Let x litres of B be added. > (7 + x)/(70 + x) = 1/4 → 28 + 4x = 70 + x > 3x = 42 → x = 14 So 14 litres. Check: 21/84 = 25%.

1146.(D) 1 : 5

The mixture is sold at the price of pure milk, so the water added is pure profit. For a 20% gain the mixture must contain 20% more volume than the milk paid for. So milk : mixture = 100 : 120 = 5 : 6. > Let milk = 5 units → mixture = 6 units > water = 6 − 5 = 1 unit > water : milk = 1 : 5 By alligation: price of water 0, price of milk 1, mean price 1/1.2 = 5/6. That gives water : milk = (1 − 5/6) : (5/6 − 0) = 1 : 5.

1147.(D) 132

Take the third number as 2k, so the first is 6k and the second 3k. > 6k + 3k + 2k = 3 × 121 = 363, so k = 33 > First = 198, third = 66 The gap between them is 132.

1148.(D) ₹ 1650

Adding the manager raises the average of 17 people to ₹850. > Total of 16 workers = 16 × 800 = 12800 > Total of 17 = 17 × 850 = 14450 > Manager = 14450 − 12800 = 1650 So ₹1650. Shortcut: manager = new average + 16 × rise = 850 + 16 × 50 = 1650.

1149.(B) 3 : 4

Work out the two statements one at a time. > I: the group's total age rises by 8 × 2 = 16, so the two new boys total 21 + 23 + 16 = 60 and x = 30 > II: A + B + C now = 3 × 27 + 9 = 90; B + C now = 2 × 20 + 10 = 50 > y = 90 − 50 = 40 > 30 : 40 = 3 : 4

1150.(D) 30

> Sum = 25 × 3 = 75 > Ratio parts = 4 + 5 + 6 = 15, so one part = 75 ÷ 15 = 5 > Numbers = 20, 25, 30 The largest number is 6 × 5 = 30.

14 more Averages & Mixtures questions in the book

You have read the ten the Commission asks most. The rest of this topic — and all 4,239 questions across the book, each with a worked solution — come with either edition.

Read it now

Digital edition

The whole book online, on any device. Read it or attempt it question by question. Nothing to download, nothing to wait for.

Access does not expire, and includes every test released later in whichever series you buy.

You sign in with your phone number as part of checkout — that is what your copy is tied to.

On paper

Printed book — ₹999

536 pages, delivered. Five full papers and five OMR sheets at the back. Online access is included free, from the moment you pay.

See the printed book →

Common questions about Averages & Mixtures in PPSC

How many Averages & Mixtures questions come in PPSC exams?

The Commission set 24 Averages & Mixtures questions across 36 papers between 2018–2026. That is the whole set, not a sample — every one of them is in the book, and the 10 most-asked are on this page free.

Are PPSC Averages & Mixtures questions repeated?

Yes. 3 of these 24 were set in more than one exam, which is why they are worth working rather than reading. Each question here carries a badge showing how many sittings asked it.

Where can I get Averages & Mixtures MCQs with answers and solutions?

Here. Every question on this page is a solved MCQ: the four options as printed, the correct answer, and a worked explanation in plain English — not just a letter. The rest of the 24 are in the book, in the same form.

Can I practice these Averages & Mixtures questions online?

Switch to Attempt mode at the top of the questions. You get one question at a time and it is marked the moment you pick an option, with the reason underneath — the same way the exam feels, on your phone.

Is a PDF available?

The questions are on screen rather than in a downloadable file, so they stay current and correct. The printed book has all 24 of these plus the rest of the Reasoning & Aptitude section, and every buyer gets the whole thing online as well.

Which papers asked Averages & Mixtures

The exams behind these questions, most first. A paper here is a sitting: a question set in two papers of the same sitting counts once.

Exam	Year	Questions
Enquiry Officer	2018	4
Assistant Director, Industrial Training Principal Junior Scale Industrial Traini	2018	4
Senior Scientific Officer (Drugs)	2018	4
Drugs Control Officer	2018	4
Senior Scientific Officer (Food Safety) Microbiology	2018	4
Punjab Civil Services (Prelims) — CSAT	2025	3
Works Manager	2018	3
Legal Assistant	2019	2
Research Officer	2019	2
Technical Assistants	2019	2
Network Engineer	2019	2
Superintendent Home	2019	2