Concept explainers
To find: the
Answer to Problem 83E
Theprobability that the customer paid with a credit card is
Explanation of Solution
Given:
88% of the automobiles filled their vehicles with regular gasoline, 2% purchase midgrade gas and 10% bought premium gas.
28% is paid with credit card on regular gas, 34% is paid on midgrade gas, and 42% on premium gas.
Concept used:
Definition of conditional probability:
Calculation:
According to the question, the tree diagram is:
Now, to findthe probability of paying with credit card for each type of gasoline.
Add the corresponding probabilities:
Hence,the probability that the customer paid with a credit card is
Chapter 5 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Essentials of Statistics, Books a la Carte Edition (5th Edition)
Elementary Statistics
STATS:DATA+MODELS-W/DVD
Statistics for Business and Economics (13th Edition)
Intro Stats, Books a la Carte Edition (5th Edition)
Essentials of Statistics (6th Edition)
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