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A certain standardized​ test's math scores have a​ bell-shaped distribution with a mean of 525 and...

A certain standardized​ test's math scores have a​ bell-shaped distribution with a mean of 525 and a standard deviation of 110. Complete parts​ (a) through​ (c). ​(a) What percentage of standardized test scores is between 195 and 855? (b) What percentage of standardized test scores is less than 195 or greater than 855? (c) What percentage of standardized test scores is greater than 745​?

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