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Mrs. Starnes enjoys doing Sudoku puzzles. The time she takes to complete an easy puzzle can be modeled by a Normal distribution with mean 5.3 minutes and standard deviation 0.9 minute.
What percent of easy Sudoku puzzles take Mrs. Starnes between 6 and 8 minutes to complete?

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Mrs. Starnes enjoys doing Sudoku puzzles. The time she takes to complete an easy puzzle can be model...

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