Posted by **Snehan** on Monday, April 29, 2013 at 3:06am.

On a true-false test, each question has exactly one correct answer: true, or false. A student knows the correct answer to 70% of the questions on the test. Each of the remaining answers she guesses at random, independently of all other answers. After the test has been graded, one of the questions is picked at random. Given that she got the answer right, what is the chance that she knew the answer?

unanswered

## Answer This Question

## Related Questions

- Stat HW for. - 1. A student taking a midterm exam in Ancient History comes to ...
- Statistics - A true-false test consists of 20 questions, each of which has one ...
- Statistical concept 68-95-99.7 - 1. A student taking a midterm exam in Ancient ...
- Stats - An instructor gives a test with 20 multiple choice questions. There are ...
- Math (pre-celc 12) - A true false test has 15 questions. How many answer keys ...
- Math - A student takes a true-false test exam with 10 questions. If the student ...
- Fitness (Check answers) - 6) Gang member often have weapons and are involved in ...
- statistics - a test consists of true/false questions .to pass the test a student...
- maths - Suppose a student guesses the answer to a true or false Question on a ...
- PHI103: Informal Logic - 1) In the truth table for an invalid argument, Student ...

More Related Questions