SOLUTION: a test consists of 100 true or false questions. If the students guesses on each question, what is the mean number of correct answer

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Question 360957: a test consists of 100 true or false questions. If the students guesses on each question, what is the mean number of correct answer
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Each answer has a probability of p=0.5.
For a binomial distribution,
E%28X%29=np=100%280.5%29=50
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50 correct answers.