Formulas

Statistics & Probability Formulas – IGCSE Maths

Every statistics & probability formula you need for Cambridge IGCSE Mathematics 0580, with clear explanations of when and how to use each one.

Mean = Σx / n

Core

\text{Mean} = \dfrac{\Sigma x}{n}

Key formula for statistics & probability in IGCSE Maths.

Use when working with statistics & probability problems.

Show your substitution clearly for method marks.

Core

\text{Estimated mean} = \dfrac{\Sigma fx}{\Sigma f}

Key formula for statistics & probability in IGCSE Maths.

Use when working with statistics & probability problems.

Show your substitution clearly for method marks.

Core

P(A \cup B) = P(A) + P(B) - P(A \cap B)

Key formula for statistics & probability in IGCSE Maths.

Use when working with statistics & probability problems.

Show your substitution clearly for method marks.

Core

P(A \cap B) = P(A) \times P(B)

Key formula for statistics & probability in IGCSE Maths.

Use when working with statistics & probability problems.

Show your substitution clearly for method marks.

Core

\text{IQR} = Q_3 - Q_1

Key formula for statistics & probability in IGCSE Maths.

Use when working with statistics & probability problems.

Show your substitution clearly for method marks.

Struggling to remember these formulas?

Teacher Rig helps students master them through practice, not memorisation.

Which statistics & probability formulas are given in the exam?

Check the IGCSE formula sheet provided in your exam. Some statistics & probability formulas must be memorised.

How do I remember statistics & probability formulas?

Practice using them in past paper questions. Repeated application is more effective than rote memorisation.

Book a free trial class with Teacher Rig for personalised formula practice.