SOLUTION: The probability that a student guesses the correct answer to a four choice multiple choice question is P(correct)=0.25. How many correct answers should a student expect to guess on

Question 859191: The probability that a student guesses the correct answer to a four choice multiple choice question is P(correct)=0.25. How many correct answers should a student expect to guess on a test with 76 four choice multiple choice questions?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

Re TY 

.25 or 1/4 of the questions can be answered correctly by guessing

 1/4 of 76 is 

 p(answer question correctly) = .25

How many correct answers should a student expect to guess on a test 

with 76 four choice multiple choice questions? .25*76 = 19 

RELATED QUESTIONS

The probability that a student guesses the correct answer to a four-choice multiple... (answered by math_tutor2020,ikleyn)
A student randomly guesses at 10 multiple-choice questions. Find the probability that the  (answered by Fombitz,ewatrrr)
A student randomly guesses at 7 multiple choice questions. Each question has 5 possible... (answered by stanbon)
If a student randomly guesses at 20 multiple-choice questions, find the probability that... (answered by stanbon)
If a student randomly guesses at 20 multiple-choice questions, find the probability that... (answered by stanbon)
If a student randomly guesses at 15 multiple-choice questions, find the probability that... (answered by Boreal)
A multiple-choice test consists of ten questions. Each with four choices.  Calculate the... (answered by stanbon)
A student randomly guesses at 7 multiple choice questions. Each question has 5 possible... (answered by edjones)
If a student randomly guesses at 20 multiple-choice questions, find the probability... (answered by richwmiller)