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A box of oatmeal must contain 1818 oz. The machine that fills the oatmeal boxes is...

A box of oatmeal must contain 1818 oz. The machine that fills the oatmeal boxes is set so​ that, on​ average, a box contains 19.2 oz. The boxes filled by the machine have weights that can be closely approximated by a normal curve. What fraction of the boxes filled by the machine are underweight if the standard deviation is

0.4 ​oz?

math   Statistics-And-Probability   
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