A bag contains 8 blue marbles, 7 red marbles and 5 green marbles. You reach into the bag and select a marble and note its color. You place the marble back. You select a second marble and note its color and place it back. You pick a marble for the 3rd time and note its color. What are the chances of selecting three marbles

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. A bag contains 8 blue marbles, 7 red marbles and 5 green marbles. You reach into the bag and select a marble and note its color. You place the marble back. You select a second marble and note its color and place it back. You pick a marble for the 3rd time and note its color. What are the chances of selecting three marbles with at least two being the same color?

 

 

can please get an explnation on this with a punnet square and the calucations step by step 

and the answer is a fraction 

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