Department of the Geological Survey of Canada is intersted in knowing the height of the summits in the Canadaian rockies. A team of geologists measures height of 400 peaks acorss the canadian rockies mountaouns range. In this study, it was found that the heights distibution is normal with average to be 2780 m with standard deviation 340 m above the sea-level. What precentage of the summits are taller than 2500 m and shorter than 3250 m?

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