Chapter 14 · Class 10 CBSE · Formula Sheet

Probability Formulas — Class 10 CBSE

Calculate theoretical probability of events and solve problems on complementary events.

Key Formulas

Theoretical Probability

P(E) = \dfrac{\text{Number of favourable outcomes}}{\text{Total number of outcomes}}

Complementary

P(\bar{E}) = 1 - P(E)

Sure Event

P(S) = 1

Impossible Event

P(\phi) = 0

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 10 CBSE Formulas

Real NumbersPolynomialsPair of Linear Equations in Two VariablesQuadratic EquationsArithmetic ProgressionsTriangles

Frequently Asked Questions

How many formulas are in Class 10 CBSE Probability?+
There are 4 formulas in the Probability chapter for Class 10 CBSE. 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 CBSE Class 10 syllabus for Probability. Practice applying them to different types of questions for full exam readiness.

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