Mathematics · Class 6
Data Handling
Tally marks, pictographs, bar graphs, and mean of ungrouped data.
4 sections15–25 min read6 MCQs · 2 examples
Chapter Overview
Data handling teaches how to collect, organise, and present data using tally marks, pictographs, and bar graphs. You also learn mean (average) of a data set.
Recording Data
- Tally marks: group in fives (||||)
- Frequency = how often a value appears
- Organise raw data in tables
Pictographs and Bar Graphs
- Pictograph uses symbols; check scale (e.g. 1 symbol = 10 students)
- Bar graph: bars of equal width, heights proportional to values
- Choose scale carefully for clear graphs
Mean (Average)
Mean
Mean = Sum of all observations ÷ Number of observations
Solved Examples
Step-by-step solutions — read each step before checking the final answer.
Example 1: Tally Marks
Scores: 4, 5, 4, 3, 5, 4, 5, 3, 4. Find frequency of 4.
- 1Count how many times 4 appears
Answer
Frequency of 4 = 4
Example 2: Mean
Runs scored: 45, 32, 28, 55, 40. Find mean.
- 1Sum = 200
- 2Number of innings = 5
- 3Mean = 200 ÷ 5
Answer
40 runs
Key Points to Remember
- ✓ Always state scale on pictographs
- ✓ Bar graph axes must be labelled
- ✓ Mean is one measure of central tendency
Exam Tips
- • Read graph scale before answering
- • Show sum and division for mean
Practice MCQs — Data Handling
Test your understanding with topic-wise multiple choice questions. Explanations appear after each answer.
Question 1 of 6Score: 0/0
Mean of 10, 20, 30 is: