Mathematics 0580 · IGCSE · Probability of combined events

Probability of combined events — practice question

Sushila, Ravi and Talika each own a bag of balls, and every bag has 10 red balls together with 8 blue balls.
(a)[1]

Find the probability that the ball she picks is red.

(b)[3]

Find the probability that one ball is red and one ball is blue.

(c)[4]

Calculate the probability that the three balls are the same colour.

Worked solution & mark scheme

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

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