Posted by **gio** on Friday, February 18, 2011 at 10:09pm.

a test consists of 25 multiple choice questions. Each has 5 possible answers, which only one is correct. If a student guesses on each question, find the following:

a) prob that he will guess all of them right

b)prob that he will guess at most 12 right

c) prob that he will guess at least 1 right

d) mean and stndrd. deviation of the number of correct answers

e)estimate the prob of the number of correct answers that will fall within the limits -----> miu +or- 2(stand.dev)

## Answer this Question

## Related Questions

- elementary stats - On a multiple choice test with 11 questions, each question ...
- Statistics - A multiple choice test consists of 60 questions. Each question has ...
- LBCC - A multiple choice quiz consists of 20 questions, each with 3 possible ...
- stat probability - A multiple choice quiz consists of 20 questions, each with 3 ...
- Finite Math - A biology quiz consists of 10 multiple -choice questions. 7 must ...
- MATH Prob. - Find the probability of correctly answering the first 4 questions ...
- advanced statistics - suppose a student takes a multiple choice test with 10 ...
- Binomial Distribution - A biology quiz consists of twelve multiple-choice ...
- MATH Prob. - Find the probability of correctly answering the first 4 questions ...
- Statistics - There are 100 questions from a SAT test, and they are all multiple ...