Mathematics 0580 · IGCSE · Probability of combined events

Probability of combined events — practice question

The bag has 5 white balls together with 3 black balls.

(a(i))[1]

Find the probability that the ball is white.

(a(ii))[1]

Find the number of times the ball is expected to be white.

(b(i))[3]

Find the probability that the balls are the same colour.

(b(ii))[1]

Find the probability that the balls are not the same colour.

(c)[3]

Find the probability that she picks two white balls and one black ball.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correct result $\frac{5}{8}$” …