An urn has 4 red, 2 blue, 5 yellow, and 7 green marbles. A blue marble was drawn on the first draw and not replaced. What is the probability of a blue marble on the second draw?  What is the probability of a yellow marble on the second draw?  Assume a yellow is drawn on the second draw and replaced. What is the probability of a yellow on the third?

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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  1. An urn has 4 red, 2 blue, 5 yellow, and 7 green marbles. A blue marble was drawn on the first draw and not replaced.

    1. What is the probability of a blue marble on the second draw? 
    2. What is the probability of a yellow marble on the second draw? 
    3. Assume a yellow is drawn on the second draw and replaced. What is the probability of a yellow on the third? 
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