Rice - packaging line

An automatic machine weighs rice into packages on a packaging line. Suppose that the mass of rice in a package is a random variable which has a normal probability distribution with mean value (Greek letter Mu) = 500 g and standard deviation (Greek letter Sigma) =5 g.
a) What is the probability that a randomly selected package will contain less than 495 g of rice?
b) Determine the mass that only 10% of the heaviest packages exceed.

Your answer:

g


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