Posted by **Anna Swain** on Saturday, August 27, 2011 at 11:47pm.

The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 166 and a variance of 4. The material is considered defective if the breaking strength is less than 160 pounds. What is the probability that a single, randomly selected piece of material will be defective? (Give the answer to two decimal places.

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