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What percentage of regular grade gasoline sold

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The Energy Information Administration reported that the mean retail price per gallon of regular grade gasoline was 3.41$. Suppose that the standard deviation was $.10   and that the retail price per gallon has a bell-shaped distribution.

NOTE: Please use empirical rule approximations for this problem.

a. What percentage of regular grade gasoline sold between $3.21 and $3.61 per gallon (to 1 decimal)?

b. What percentage of regular grade gasoline sold between $3.21 and$ 3.51 per gallon (to 1 decimal)?

c. What percentage of regular grade gasoline sold for less than 3.61$ per gallon (to 1 decimal)?

Reference no: EM132464588

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