Chapter 13 · Class 9 ICSE · Formula Sheet

Statistics Formulas — Class 9 ICSE

Calculate mean, median, and mode for grouped and ungrouped data sets.

Key Formulas

Mean

\bar{x} = \dfrac{\sum f_i x_i}{\sum f_i}

Median

\text{Middle value of ordered data}

Mode

\text{Most frequent value}

Probability

P(E) = \dfrac{n(E)}{n(S)}

Worked Examples

1Using: Probability

A die is thrown. Find P(getting an even number).

Step 1: Even outcomes: {2, 4, 6} = 3.

Step 2: Total outcomes = 6.

Step 3: P = 3/6 = 1/2.

Answer: 1/2

Practice Now

Apply these formulas with 60+ practice questions and AI-powered doubt clearing.

Practice Now

More Class 9 ICSE Formulas

Rational & Irrational NumbersCompound InterestExpansionsFactorizationSimultaneous Linear EquationsIndices (Exponents)

Frequently Asked Questions

How many formulas are in Class 9 ICSE Statistics?+
There are 4 formulas in the Statistics chapter for Class 9 ICSE. Each formula is essential for solving problems in this topic.
How to remember Statistics formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Statistics formulas enough for exams?+
Yes, these formulas cover the complete ICSE Class 9 syllabus for Statistics. Practice applying them to different types of questions for full exam readiness.

Master Statistics on SparkEd

Go beyond formulas. Practice at three difficulty levels with instant feedback, step-by-step solutions, and an AI coach.

Start Practising Free

SparkEd Maths provides free formula sheets for Class 1-10 across 7 education boards. All formulas are aligned to the 2025-26 syllabus.