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In: Statistics and Probability

5 students attending an exam. Let Si be the event of student i passes an exam....

5 students attending an exam. Let Si be the event of student i passes an exam. S1 and S2 may or may not be independent of each other. Let random variable X be total number of students who pass the exam. P(S1) = P(S2) = 2/3. X = 0, 1, 2, 3, 4, 5.

1) E(X)

2) What is the min and max of var(X)

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orchestra answered 2 years ago
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