b. A box contains 7 balls, 2 of which are red, 3 are blue and 2 green. Suppose that 2 balls are randomly selected from the box. (i) De ne a sample space for selecting the balls from the box. (ii) Find the probability that exactly one red ball is chosen. (iii) Find the probability that 2 balls of the same colour are chosen. (iv) What is the probability that either a blue or a green ball is selected?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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b. A box contains 7 balls, 2 of which are red, 3 are blue and 2 green. Suppose that
2 balls are randomly selected from the box.
(i) De ne a sample space for selecting the balls from the box.
(ii) Find the probability that exactly one red ball is chosen.
(iii) Find the probability that 2 balls of the same colour are chosen.
(iv) What is the probability that either a blue or a green ball is selected?

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