SOLUTION: Please help me out for this question. There are only 2 choices, A and B per question and number of total questions is 100. What is the prob of n students have m same choices ou

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Question 916693: Please help me out for this question.
There are only 2 choices, A and B per question and number of total questions is 100. What is the prob of n students have m same choices out of 100? For instance, what is the prob of 2 students have 20 same choices out of 100questions?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
p(same choice) = 1/2, n = 100
P(x = m) = 100Cm%28.5%5Em%29%28.5%29%5E%28100-m%29