3 The mass of packages from a particular machine are normally distributed with a mean of 200g and variance 9g. Find the probability that a randomly selected package from the machines weighs less than...

correct answer Q3

Extracted text: 3 The mass of packages from a particular machine are normally distributed with a mean of 200g and variance 9g. Find the probability that a randomly selected package from the machines weighs less than 196g Give your answer correct to 3 d.p. Type your answer. 4 The mass of packages from a particular machine are normally distributed with a mean of 100g and variance 16g. Find the probability that a randomly selected package from the machines weighs between 99g and 101g Give your answer correct to 3 d.p. Type your answer.