A bag contains 2 red, 3 green, and 4 black balls of identical size except color. 3 balls are drawn at random without replacement. 1. Show that the probability that two balls have the same color and the third is different is 55/34. 2. What is the probability that one is red.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
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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A bag contains 2 red, 3 green, and 4 black balls of identical size except color. 3 balls are drawn at random without replacement.

1. Show that the probability that two balls have the same color and the third is different is 55/34.

2. What is the probability that one is red.

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