SOLUTION: You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on

Question 746085: You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the test?
Help much needed and appreciated.

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
You have a ten question multiple choice test in your next class and you did not study at all. Each question has four choices and only one correct answer. You are going to guess on each question. What is the probability that you score at least a 20% on the test?
----------------------
Binomial Problem with n = 10 and p(correct) = 1/4
----
P(2<= x <=10) = 1 - P(0<= x <=1) = 1-binomcdf(10,1/4,1) = 0.756
===================================
Cheers,
Stan H.
==============

RELATED QUESTIONS
Richard has just been given a ten-question multiple choice test in his history class.... (answered by ewatrrr)

How to do this problem Willard has just been given a ten question multiple choice test in (answered by solver91311)

You are taking a 10 question multiple choice test. Each question has four possible... (answered by solver91311)

Hi, could you please help me with this question: A multiple choice test consists of... (answered by ikleyn)

There are 20 questions in a multiple-choice test. Each question has five choices and one (answered by stanbon)

Willard has just been given a ten-question mulitiple choice test in one of his classes.... (answered by stanbon)

You have a 5-question multiple-choice test. Each question has four choices. You don�t... (answered by stanbon)

Richard has just been given a 4-question multiple-choice quiz in his history class. Each... (answered by stanbon)