Chapter 14 · Class 8 ICSE · Formula Sheet

Probability Formulas — Class 8 ICSE

Understand basic probability concepts with experiments on coins, dice, and cards.

Key Formulas

Mean

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

Median (Odd)

\left(\dfrac{n+1}{2}\right)^{\text{th}} \text{term}

Median (Even)

\dfrac{1}{2}\left[\left(\dfrac{n}{2}\right)^{\text{th}} + \left(\dfrac{n}{2}+1\right)^{\text{th}}\right]

Probability

P(E) = \dfrac{\text{Favourable outcomes}}{\text{Total outcomes}}

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

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More Class 8 ICSE Formulas

Rational NumbersExponents & PowersSquares & Square RootsCubes & Cube RootsAlgebraic ExpressionsFactorization

Frequently Asked Questions

How many formulas are in Class 8 ICSE Probability?+
There are 4 formulas in the Probability chapter for Class 8 ICSE. Each formula is essential for solving problems in this topic.
How to remember Probability 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 Probability formulas enough for exams?+
Yes, these formulas cover the complete ICSE Class 8 syllabus for Probability. Practice applying them to different types of questions for full exam readiness.

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