Engineering Board Exam Reviewer · Binomial Distribution · medium
A quiz has 10 multiple-choice questions with 5 choices each. A student guesses every answer. What is the probability of getting at least one correct?
- 0.1074
- 0.8926
- 0.2
- 0.9
Answer
B. 0.8926
Solution
P( at least 1)=1-P( none)=1-(0.8)10=1-0.1074=0.8926.
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