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James is sitting a multiple choice exam with 12 questions. Each question has 5 answer choices, of which only one is correct.
James randomly picks an answer on each question. Let X represent the number of questions James answers correctly.
State whether X is discrete or continuous.
Write down the value of E(X).
Find the probability that
X=4,
2<X<9.
James is sitting a multiple choice exam with 12 questions. Each question has 5 answer choices, of which only one is correct.
James randomly picks an answer on each question. Let X represent the number of questions James answers correctly.
State whether X is discrete or continuous.
Write down the value of E(X).
Find the probability that
X=4,
2<X<9.