Asked by Student
Thank you for the explanation MathMate! Would the answer to this question be A?
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct?
A. 0.23
B. 0.34
C. 0.66
D. 0.78
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct?
A. 0.23
B. 0.34
C. 0.66
D. 0.78
Answers
Answered by
MathMate
Sorry that the previous response was for 4 correct.
The number ways to have at least 4 correct is
(6,4)+(6,5)+(6,6)
=15+6+1
=22
To total number of ways to respond is
2^6=64
So the probability is 22/64.
The number ways to have at least 4 correct is
(6,4)+(6,5)+(6,6)
=15+6+1
=22
To total number of ways to respond is
2^6=64
So the probability is 22/64.
Answered by
Anonymous
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