Posted by **Zach** on Thursday, November 12, 2009 at 9:25pm.

On a multiple choice test with 10 questions and 5 choices, A,B,C,D,E, for each questions, what are the odds of guessing on all 10 questions and getting 100%. State your answer as a common fraction.

Thanks

-Zach

- Algebra 1 -
**Reiny**, Thursday, November 12, 2009 at 9:33pm
the prob of getting all 5 correct is

(1/10)*(1/10)*(1/10)*(1/10)*(1/10)

= (1/10)^5 or

= 1/100,000

so the prob of NOT getting all 5 correct

= 1 - 1/100,000 = 99999/100,000

so the odds in favour of getting all 5 correct is

1 : 99,999

- Algebra 1 -
**Zach**, Thursday, November 12, 2009 at 9:36pm
Thanks

And I think you answered my question last time i posted, so thanks for keep on rollin'

:)

- Algebra 1 -
**Reiny**, Thursday, November 12, 2009 at 10:07pm
welcome!

## Answer This Question

## Related Questions

- Stats - An instructor gives a test with 20 multiple choice questions. There are ...
- Math - Given a multiple choice test with 4 choices for each question and 17 ...
- statistics - A test consists of 12 multiple choice questions with 5 choices for...
- Statistic - test consists of 10 multiple choice questions with five choices for ...
- Statistics - A multiple choice test has five choices. Therefore the probability ...
- statistics - A multiple choice test has 3 questions and each question has 3 ...
- math - Part A of your history test has 15 multiple choice questions. Each ...
- math-Probablity - A student is writing a multiple choice test consisting of 40 ...
- math - A multiple-choice test has 10 questions. Each question has 5 choices. If ...
- Algebra - A test has 15 questions worth 100 points in total. The test consists ...

More Related Questions