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The lengths of the rods from a new cutting machine can be said to approximate a...

The lengths of the rods from a new cutting machine can be said to approximate a normal distribution with a mean of 10 meters and a standard deviation of 2 meters. Find the probability that a rod selected will have a length: a) of less than 10.0 meters, b) between 10.1 and 10.4 meters, c) greater than 9.9 meters

What should be the length of a rod such that the chance of producing rods longer than it is 2.5%

Math   Statistics-And-Probability   
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