Originally Posted by
jbwtucker A student is presented with a test consisting of standard multiple choice problems: each problem has four options, and they may select only one.
For each question, the student is able to eliminate two of the options, both of which he knows to be incorrect.
Once the student has eliminated the answers he knows to be incorrect, he guesses randomly between the remaining options.
What is the probability that the student will get at least a passing score of 70% on the test?