Mathematics 0580 · IGCSE · Probability of combined events

Probability of combined events — practice question

Rui has a bag with only 5 black pens, 8 red pens and 3 blue pens inside it. He selects one pen from the bag at random.

(a)[1]

Place an arrow on the probability scale to indicate the probability that Rui picks a red pen.

(b)[1]

Place an arrow on the probability scale to show the probability that Rui picks a red pen or a blue pen.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Arrow placed at $\frac{1}{2}$” …