The lengths of a large stock of titanium rods follow a normal distribu – McqOptions

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1.	The lengths of a large stock of titanium rods follow a normal distribution with a mean ( ) of 440 mm and a standard deviation ( ) of 1 mm. What is the percentage of rods whose lengths lie between 438 mm and 441 mm?
A.	68.4%
B.	99.75%
C.	81.85%
D.	86.64%
Answer» D. 86.64%

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