IB skill practice

Calculate probability with diagrams

Use tree diagrams, Venn diagrams, and sample spaces to calculate probability.

Paper 2 5 marks Difficulty 3

Calculate probability with diagrams - diagram probability B12

A probability diagram gives \(P(A)=0.35\), \(P(B)=0.4\), and \(P(A\cap B)=0.12\). Enter \(P(A\cup B)\).

Worked practice: result and interpretation

Calculate the requested result first, then choose the interpretation that follows from it.