Hi guys,

Im new to the forum and this is my first post. I am in very urgent need of some help I have been practising some prob & stat for an exam, tomorrow and have been doing pretty well till I came upon this question. Can anyone help I dont understand this topic very well and I have reason to believe that a similar question will come on the exam tomorrow I want to know how to go about doing it thanks in advance.

Alicia

The question is attached. Thanks a million.

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