SOLUTION: On a 7 question multiple-choice test, where each question has 3 answers, what would be the probability of getting at least one question wrong? Give your answer as a fraction

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Question 1166728: On a 7 question multiple-choice test, where each question has 3 answers, what would be the probability of getting at least one question wrong?
Give your answer as a fraction
Answer by ikleyn(52810)   (Show Source):
You can put this solution on YOUR website!
.

The probability to answer all questions correctly is . The probability of getting at least one question wrong is the complement to it P = 1 - . ANSWER

Solved.

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For introductory lessons on Elementary Probability theory see the lessons
    - Simple and simplest probability problems
    - Solving probability problems using complementary probability
    - Elementary Probability problems related to combinations
    - A True/False test
    - A multiple choice answers test
    - Conditional probability problems
    - Typical probability problems from the archive
    - Experimental probability problems
    - Elementary operations on sets help solving Probability problems
in this site.

Also, you have this free of charge online textbook in ALGEBRA-II in this site
    - ALGEBRA-II - YOUR ONLINE TEXTBOOK.

The referred lessons are the part of this online textbook under the topic "Solved problems on Probability".

Save the link to this textbook together with its description

Free of charge online textbook in ALGEBRA-II
https://www.algebra.com/algebra/homework/complex/ALGEBRA-II-YOUR-ONLINE-TEXTBOOK.lesson

into your archive and use when it is needed.

Consider these lessons as your textbook, handbook, a Solutions Manual, tutorials and (free of charge) home teacher.

Happy learning (!)