SOLUTION: an unprepared student makes a random guesses on all questions if her multiple choice test. If there are 17 questions and each question has 4 possible answers, what is the probabili

Question 353428: an unprepared student makes a random guesses on all questions if her multiple choice test. If there are 17 questions and each question has 4 possible answers, what is the probability she will answer at least one answer right
Found 2 solutions by robertb, edjones:
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!

Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
expand the binomial (x+y)^17
Let x=..75 and y=.25
.
x^17=.0075 all wrong.
1-.0075=.9925 probability she will answer at least one answer right.
.
Ed
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