Post a New Question

math

posted by .

A 10-item multiple choice test with 4 options (A,B,C,D) is given to a class in English, what is the probability that the student’s answers are of the same letters

  • math -

    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

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question