来自但华伟的问题
Acompanyismadeupof450employeeswhoworkatotalof13,500hoursperweek.IfThenumberofweeklyworkhoursperpersonhasanormaldistributionandthestandarddeviationequals7hours,howmanyemployeesworkmorethan37hoursperweek?
Acompanyismadeupof450employeeswhoworkatotalof13,500hoursperweek.IfThenumberofweeklyworkhoursperpersonhasanormaldistributionandthestandarddeviationequals7hours,howmanyemployeesworkmorethan37hoursperweek?

