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In the city of Paris, exactly 20% of the population likes Nutella. Suppose 400 people are chosen at random from the city, andXis thetotal number

In the city of Paris, exactly 20% of the population likes Nutella. Suppose 400 people are chosen at random from the city, andXis thetotal number of these people who like Nutella (thusX is an integer in the range 0 to 400). What is the variance of X? Assume that each person's preference is independent.

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