Each of 5 households owns at least one television set. What is the standard deviation of the numbers of television sets

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Each of 5 households owns at least one television set. What is the standard deviation of the numbers of television sets owned by the 5 households?

(1) At least 4 of the households own the same number of television sets.

(2) One of the households owns 3 television sets.

Answer: E

Source: GMAT Prep