Posted by mae on Friday, June 29, 2012 at 8:28am.
A 10item multiple choice test with 4 options (A,B,C,D) is given to a class in English, what is the probability that the studentâ€™s answers are of the same letters

math  Reiny, Friday, June 29, 2012 at 10:28am
let's pick one of the letters, say the A
Prob(A) = 1/4
you want that to happen 10 times in a row
prob(10 A's) = (1/4)^10
but the same reasoning can be used for each of the 4 letters, so
prob(10 of the same letter) = 4(1/4)^10 = (1/4)^9
Answer This Question
Related Questions
 Math  a 10 question multiple choice test has 4 possible answer for each ...
 Math  A student guesses on every ??? of a multiple choice test that has 9 ...
 statistics  A student is taking a multiple choice test where each question have...
 statistics  10. A student is taking a multiple choice test where each question ...
 statistics  A math test consists of 17 multiple choice questions, each with ...
 psychology statistics for behavioral sciences  A multiplechoice test has 48 ...
 statistic  A multiplechoice test has 48 questions, each with four response ...
 probability and statistics  a multiple choice test onsists of 8 questions, each...
 probability  a multiple choice test consists of 8 questions, each with 4 ...
 Statistics Algebra 2  A 10question multiple choice test has 4 possible answers...
More Related Questions