posted by Twg on .
Jack is taking a four-item true–false test. He has no
knowledge about the subject of the test and decides to
flip a coin to answer the items. What is the probability
that he receives a perfect score? What is the probability
on a 10-item test?
The probability of getting the correct answer is 1/2
The probability of getting 4 correct in a row, to make a perfect on a 4 question test, can be found by (1/2)^4, or 1/16.
What do you think the probability of getting a perfect on a 10-item test?