SOLUTION: An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right?
Algebra ->
Probability-and-statistics
-> SOLUTION: An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right?
Log On
Question 420712: An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! An unprepared student randomly circles answers in a multiple choice test having 25 questions each with 5 possible answers. How many answers should he expect to get right?
----
E(x) = mean = np = 25(1/5) = 5 (# he can expect to get right)
=================================================================
Cheers,
Stan H.
========
(