Posted by **Sue** on Sunday, March 3, 2013 at 7:22pm.

A multiple choice test has five choices. Therefore the probability of getting the correct answer by guessing is 0.2. The test has six questions. Use the binomial formula with n = 6 and p = 0.2 to (a) Determine probability of getting two questions correct.

(b)Determine probability of getting between one and four (inclusive) correct

- Statistics -
**PsyDAG**, Monday, March 4, 2013 at 1:03pm
If the events are independent, the probability of both/all events occurring is determined by multiplying the probabilities of the individual events.

2 correct = .2^2 * .8^4 = ?

1 correct = .2 * .8^5 = ?

3 correct = .2^3 * .8^3 = ?

4 correct = .2^4 * .8^2 = ?

Either-or probabilities are found by adding the individual probabilities, so add the probabilities you have found.

- Statistics -
**Heidi**, Monday, June 30, 2014 at 3:19pm
A unbiased die is thrown seven times. Find the probability of throwing at least five six's.

## Answer this Question

## Related Questions

- statistics - A test consists of 12 multiple choice questions with 5 choices for...
- psychology statistics for behavioral sciences - A multiple-choice test has 48 ...
- Stats - An instructor gives a test with 20 multiple choice questions. There are ...
- statistic - A multiple-choice test has 48 questions, each with four response ...
- Algebra 1 - On a multiple choice test with 10 questions and 5 choices, A,B,C,D,E...
- statistics - A multiple-choice test consists of 29 questions with possible ...
- statistics - A multiple choice test has 20 questions with each having 4 possible...
- college - A test is composed of six multiple choice questions where each ...
- math - A multiple-choice test has 10 questions. Each question has 5 choices. If ...
- satistics - A test is composed of six multiple choice questions where each ...