The compressive strength of samples of cement can be modelled by a normal distribution with a mean of 6000 kilograms per square centimetre and a standard deviation of 100 kilograms per square...

Extracted text: The compressive strength of samples of cement can be modelled by a normal distribution with a mean of 6000 kilograms per square centimetre and a standard deviation of 100 kilograms per square centimetre. (i) (ii) (ii) What is the probability that a sample's strength is less than 6150 Kg/cm2? What is the probability that a sample's strength is between 5760 and 5897 Kg/cm2? What compressive strength is exceeded by 95% of the samples?