Mathematics 0580 · IGCSE · Introduction to probability

Introduction to probability — practice question

A bag holds $50$ counters, and $10$ of them are red. A counter is then chosen at random from the bag.

(a)[1]

Put an arrow (↓) on the scale to indicate the probability that this counter is red.

(b)[1]

Determine the probability that the counter is not red.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “An arrow placed at $0.2$” …