Difference between revisions of "2017 AMC 10B Problems/Problem 9"
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==Problem== | ==Problem== | ||
| − | + | A radio program has a quiz consisting of <math>3</math> multiple-choice questions, each with <math>3</math> choices. A contestant wins if he or she gets <math>2</math> or more of the questions right. The contestant answers randomly to each question. What is the probability of winning? | |
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| + | <math>\textbf{(A)}\ \frac{1}{27}\qquad\textbf{(B)}\ \frac{1}{9}\qquad\textbf{(C)}\ \frac{2}{9}\qquad\textbf{(D)}\ \frac{7}{27}\qquad\textbf{(E)}\ \frac{1}{2}</math> | ||
==Solution== | ==Solution== | ||
Revision as of 12:36, 16 February 2017
Problem
A radio program has a quiz consisting of 
multiple-choice questions, each with choices. A contestant wins if he or she gets 
or more of the questions right. The contestant answers randomly to each question. What is the probability of winning?
Solution
Placeholder
See Also
| 2017 AMC 10B (Problems • Answer Key • Resources) | ||
| Preceded by Problem 8 |
Followed by Problem 10 | |
| 1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
| All AMC 10 Problems and Solutions | ||
These problems are copyrighted © by the Mathematical Association of America, as part of the American Mathematics Competitions. 
