Tim participates in a multiple choice examination consisting of 100 questions. No marks are deducted
for incorrect answers and one mark is awarded for each correct answer. Tim calculates there are
65 questions he is sure of getting right. Of the remaining 35, there is a one in three (1/3) chance that
any given question is answered correctly.
What is the probability, to three decimal places, of Tim passing the exam if the pass mark is
(a) 70
(b) 75
(c) 80?
for incorrect answers and one mark is awarded for each correct answer. Tim calculates there are
65 questions he is sure of getting right. Of the remaining 35, there is a one in three (1/3) chance that
any given question is answered correctly.
What is the probability, to three decimal places, of Tim passing the exam if the pass mark is
(a) 70
(b) 75
(c) 80?