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Your firm has a contract to make staff uniforms for a fast-food retailer. The heights of the staff are normally

distributed with a mean of 70 inches and a standard deviation of 3 inches. 

a) What percentage of uniforms will have to fit staff shorter than 67 inches, i.e., P(X<67)?

b) What percentage will have to be suitable for staff taller than 76 inches, i.e., P(X>76)?

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