B bos1234 Member Joined Oct 9, 2006 Messages 491 Gender Male HSC 2007 May 12, 2007 #1 A multiple choice exam has three choices and four questions. What is the chance that a candidate who guesses all the answers randomly gets exactly two questions right?
A multiple choice exam has three choices and four questions. What is the chance that a candidate who guesses all the answers randomly gets exactly two questions right?
P pLuvia Guest May 12, 2007 #2 They have a 1/3 chance of getting it right P(2 Qs right) =4C2*(1/3)2(2/3)[/sup]2[/sup] =8/27
