The cross-sectional area of plastic tubing for use in pulmonary resuscitators is normally distributed with =

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The cross-sectional area of plastic tubing for use in pulmonary resuscitators is normally distributed with

μ = 12.5 mm2 and σ = 0.2 mm2.When the area is less than 12.0 mm2 or greater than 13.0 mm2, the tube does not fit properly. If the tubes are shipped in boxes of one thousand, how many wrong-sized tubes per box can doctors expect to find?

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