SOLUTION: There are 5 questions on a multiple choice exam, each with five possible answers. If a student guesses on all five questions, what is the probability the student gets two questions
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Question 1082728: There are 5 questions on a multiple choice exam, each with five possible answers. If a student guesses on all five questions, what is the probability the student gets two questions correct? Express your answer as a percent rounded to the nearest tenth.
A) 16.9%
B) 3.8%
C) 20.5%
D) 18.7% Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! There are 10 ways two can be correct
10*(1/5)^2(4/5)^3=10*(1/25)(64/125)=.4*64/125=25.6/125=0.2048=20.5%
C
