Draw and appropriate tree diagram, and use the multiplication principle to calculate the probabilities of all the outcomes. Each day, there is a 20% chance that you will sell an automobile. You know that 30% of all the automobiles you sell are two-door models and the rest are four-door models.

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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Draw and appropriate tree diagram, and use the multiplication principle to calculate the probabilities of all the outcomes. Each day, there is a 20% chance that you will sell an automobile. You know that 30% of all the automobiles you sell are two-door models and the rest are four-door models. 

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Step 1

The probability of you will sell an automobile is 0.20 

The probability that all automobiles you sell are two-door models given sell an automobile is 0.30

The rest are four-door automobiles.

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