SOLUTION: If you have a true/false test with 4 questions on it if you guess what is the probability of getting at least two right?

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Question 737485: If you have a true/false test with 4 questions on it if you guess what is the probability of getting at least two right?
Answer by Susan-math(40) About Me  (Show Source):
You can put this solution on YOUR website!
This is a binomial distribution with n=4, p=.50 and you want
P%28x%3E=2%29.

6%28.5%29%5E4%2B4%28.5%29%5E2%28.5%29%5E2%2B1%28.5%29%5E4=+.3750%2B.2500%2B.0625=.6875