Over time, a student analyzes her ability to guess correctly after narrowing down mutiple choice answers in a 5-selection question (choices a through e). She discovers that if she narrows her answer set to 2 or 3 choices, her probability the right answer is 0.8, but if she still has 4 or 5 choices her probability of choosing the right answer quickly decreases rapidly to .1 assuming that in general she can narrow her choices to 2 or 3 70% of the time, What is the probability that she will answer a question correctly any time she must guess? Draw the tree diagram & justify your answer.
correction. my bad and i was wrong
then its .31 i reckon
you think this is a bad question? This is word for word a question from one of my stats tests last semester
The random variable X= number of pieces of Reese.
e. none of the above