There are 6 balls in an urn, of which 4 balls are red and 2 balls are blue. You do the following: • draw a ball from the urn at random, note its colour, do not return the ball to the urn; • draw a second ball, note its colour, do not return the ball to the urn; • finally draw a third ball and note its colour. (i) Describe the corresponding discrete probability space (Ω, F, P). [25 Marks] (ii) Consider the following event, A: Exactly two of the balls are red. Write down A as a subset of the sample space Ω and find its probability, P(A).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.8: Probability
Problem 35E
Question

There are 6 balls in an urn, of which 4 balls are red and 2 balls are blue.

You do the following:

• draw a ball from the urn at random, note its colour, do not return the

ball to the urn;

• draw a second ball, note its colour, do not return the ball to the urn;

• finally draw a third ball and note its colour.

(i) Describe the corresponding discrete probability space

(Ω, F, P). [25 Marks]

(ii) Consider the following event,

A: Exactly two of the balls are red.

Write down A as a subset of the sample space Ω and find its probability, P(A).

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