please answer this question:  (a) In a manufacturing process, the diameter of steel rods is distributed normally  with a mean value of 5 mm and standard deviation of 0.1 mm. If a rod is  selected at random, what is the probability that its diameter will be:  (i) less than 4.85 mm;  (ii) between 4.9 mm and 5.1 mm?

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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please answer this question: 

(a) In a manufacturing process, the diameter of steel rods is distributed normally 
with a mean value of 5 mm and standard deviation of 0.1 mm. If a rod is 
selected at random, what is the probability that its diameter will be: 
(i) less than 4.85 mm; 
(ii) between 4.9 mm and 5.1 mm? 

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