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The average price for an electric tooth brush is 12$ with a standard deviation of 1.25. Using chebyshevs theorem find the price range for which

The average price for an electric tooth brush is 12$ with a standard deviation of 1.25. Using chebyshevs theorem find the price range for which attest 75% of the tooth brushes will sell

A. 10.50 to 14.50

B. 9.25 to 14.25

C. 9.50 to 14.50

D. 9.50 to 13.35

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