Average for SSC CPO | Concepts & Practice | SSC CPO Quantitative Aptitude

Learn the shortcut

Understand the fastest pattern for this topic before you attempt full MCQs.

Avoid common traps

See where students commonly lose marks so you can eliminate bad options earlier.

Solve faster in exam

Apply one practical method before attempting MCQs and cut down hesitation.

Summary Formula Tricks Mistakes Solved Example Practice FAQ

Average revision for SSC CPO: understand the base rule, apply the correct formula or relation, check common traps, then practise with approved questions.

Average represents equal distribution: total of observations divided by their number. Most SSC questions become faster when you work with total = average × number instead of repeatedly adding values.

SSC CPO focus: Solve the core method first, then use the approved practice questions on this page to build exam-speed accuracy.

Average revision rule: concept → formula/relation → one worked example → timed practice → error review.

Core concept
Key formula/relation
Common trap
Approved practice

Average = Sum / Number
Sum = Average × Number
Combined average = (sum of all groups)/(total items)

When one value is replaced, use the change in total instead of recalculating the whole average.

Next Step

Ready to practice this topic?

Solve topic-wise questions, measure accuracy, identify weak areas, and prepare for mock tests faster with a sharper revision flow.

Topic-wise practice built around this concept
Accuracy-focused repetition before full mocks
Weak-area clarity for smarter revision
Faster transition into timed tests

Practice Questions Login for free progress tracking

Free now

You can start learning here right away, explore formulas and tricks, and use the current limited practice flow before premium tools arrive.

Read the exact requirement before choosing a shortcut.
Keep units, signs and percentage bases consistent.
Use the final few seconds to verify direction and magnitude.

Using a memorised shortcut without checking its condition.
Skipping unit or base conversion.
Doing long arithmetic before identifying the underlying relation.

Practice example: Find the average of 19, 31, 43, 55 and 67.

Solution: The average is 43.

The average score of 24 candidates is 35 and that of 16 other candidates is 50. What is the combined average?
The average of six numbers is 38. If five of them are 31, 35, 37, 41 and 44, find the sixth number.
The average age of 8 persons is 27 years. If one person aged 35 leaves, what is the average age of the remaining 7 persons?

Learn the shortcut first

Shortcut before you solve

Average questions are usually total questions in disguise.

Faster solving steps

Use this 4-step method before solving to keep your thinking fast and repeatable.

Step 1 Identify relation

Spot the pattern, relationship, or core idea first.

Step 2 Apply same pattern

Use the same rule instead of re-solving from scratch.

Step 3 Eliminate wrong options

Remove confusing choices before comparing the last few.

Step 4 Confirm final answer

Pick the option that matches the shortcut most cleanly.

Practice Questions

Start with the first 10 questions free, then unlock the rest with premium

Now apply the trick on real questions

Use the shortcut above before solving these questions

Use Average = Total / Number and reverse it as Total = Average x Number when needed.

Tip: When one value changes, total changes first and average changes after that.

Step 1

Total = Average x Number.

Step 2

12 x 5 = 60.

Rule

Average is not a standalone value; it always represents total divided by count.

3-second trick

Convert the average into total immediately if the question asks for addition or replacement.

Trap to avoid

Changing the average directly without updating the total first.

Correct answer

60

Thinking path

There are 5 numbers.
Average is 12.
So total is 60.

Final answer: 60

Why this is fast: Once total is found, most average variations become easy.

Free now: first 10 questions Premium later: full solutions, advanced tricks, targeted practice

Q1 Medium

The average weight of 12 people is 65 kg. If a person weighing 78 kg leaves, what is the average weight of the remaining 11 people?