Statistical use of the normal distribution problems

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The discussion revolves around a practice paper focusing on statistical problems involving the normal distribution. The user seeks help specifically with questions 11, 12, and 13, expressing uncertainty about their solutions. Another participant suggests providing a more concise summary of the doubts to facilitate assistance. The user confirms they have studied the relevant material and shares an answer of 429 grams for question 13, prompting a request for the calculations behind that answer. The conversation highlights the importance of showing work in statistical problem-solving.
Paulo2014
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Hello
This attachment is a practice paper I am doing. I know how to do everything except for questions 11, 12 and 13 so I would appreciate it if someone could please show me the process for working them out. thanks in advance.
 

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anyone?
 
It is quite a lengthy document. Perhaps you can show some of your thoughts, and post your doubts in a more concise manner?
 
Those three problems are related to the statistical use of the normal distribution. Have you had that material already?
 
Yes I have read the material. The answer I just got for question 13 was 429 grams. Is that correct?
 
Where's your work? All I see are answers.
 

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