Find the probability of a sample strength

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Question - The compressive strength of cement can be modeled by a normal distribution with a mean of 7000kg/cm22 and a standard deviation of 100 kg/cm.

a) Find the probability of a sample's strength that is less than 7250 kg/cm2?

b) Find the probability that a sample's strength is between 6800 and 6900 kg/cm2?

c) What strength is exceeded by 95% of the samples?

Reference no: EM132948840

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