Posted by **Student** on Sunday, March 4, 2012 at 6:56pm.

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

- Probability -
**MathMate**, Monday, March 5, 2012 at 7:19am
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.

- Probability -
**Anonymous**, Monday, April 23, 2012 at 6:56pm
What is the probability that at least one of the three people has alzheimer's diseas

## Answer This Question

## Related Questions

- Probability - Darby guesses the answers to six questions on the math portion of...
- Probability - Darby guesses the answers to six questions on the math portion of...
- Math - Darby guesses the answers to six questions on the math portion of her ...
- Math - Darby guesses the answers to six questions on the math portion of her ...
- statistic - Quiz has 6 questions. Each question has five possible answers, only ...
- Stats - A student takes a 32 question multiple choice exam but did not study and...
- Math - 10 multiple choice questions each with three possible answers only one of...
- math - In an examination a candidate is given the four answers to four questions...
- Math (statistics) - In an examination a candidate is given the four answers to ...
- Statistics - A student is taking a multiple-choice exam with 16 questions. Each ...

More Related Questions