Question

A student takes an exam containing 11 true or false questions if the student guesses what is the probability that he will get less than six but more than three questions right

Answer 1

As the student is guessing the probability of getting any of the question correct is computed as: 1/2 = 0.5

Therefore the number of questions he gets correct from the 11 questions is modelled here as:

The probability that he will get less than six but more than three questions right is computed here as:

Therefore 0.3867 is the required probability here.