42. A total of 11 people, including you, are invited to a party. The times at which...
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42. A total of 11 people, including you, are invited to a party. The times at which people arrive at the party are independent uniform (0, 1) random variables.
(a) Find the expected number of people who arrive before you.
(b) Find the variance of the number of people who arrive before you.
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