SOLUTION: bill is taking a 10-question multiple choice exam. each question has 5 answers, of which only one is correct. since bill has missed every class, he doesn't know any of the answers

Algebra.Com
Question 924700: bill is taking a 10-question multiple choice exam. each question has 5 answers, of which only one is correct. since bill has missed every class, he doesn't know any of the answers and decides to guess on all 10 questions. find the probability that bill will answer at least half of the question correctly.
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
bill is taking a 10-question multiple choice exam. each question has 5 answers, of which only one is correct. since bill has missed every class, he doesn't know any of the answers and decides to guess on all 10 questions. find the probability that bill will answer at least half of the question correctly.
-----------------
Binomial Problem with n = 10 and p(correct) = 1/5
----
P(5<= x <=10) = 1 - binomcdf(10,1/5,4) = 0.0328
----------------
Cheers,
Stan H.
---------------

RELATED QUESTIONS

1. Joe has been given a 10 multiple-choice question in his Geography class. Each question (answered by stanbon)
John is taking an exam, but hasn’t studied or gone to class all term. He figures on... (answered by richwmiller,stanbon)
Part I of the exam has a seven question multiple-choice questions. If each question has... (answered by TimothyLamb)
A student takes a 10-question multiple choice exam and guesses on each question. (This... (answered by stanbon)
Beth is taking a ten-question multiple-choice test for which each question has three... (answered by stanbon)
In a multiple choice examination, each question has 5 possible answers, only one of which (answered by stanbon)
You are taking a multiple-choice quiz that consists of 3 questions. Each question has 4... (answered by stanbon)
Jane is taking a 10 questions multiple choice but he has not studied. Each question has 4 (answered by reviewermath)
There are twenty multiple choice questions in an exam. Each question has four possible... (answered by rothauserc)