Question
A multiple choice test has 20 questions, where each question has two options: true and false. A student either knows the answer to a question,
A multiple choice test has 20 questions, where each question has two options: true and false. A student either knows the answer to a question, or guesses at random (50:50% chance) if he/she does not know the answer.
On any question, the student knows the answer with probability 0.7
.
What is the probability that a question is answered correctly?
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Algebra And Trigonometry Enhanced With Graphing Utilities (Subscription)
Authors: Michael, Michael Sullivan III, Michael III Sullivan, Michael Sullivan 111, III Sullivan
6th Edition
