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Help please for this one on lesson 8 Question 3 A manufacturer knows that their items have a normally distributed lifespan, with a mean of

Help please for this one on lesson 8
Question 3 A manufacturer knows that their items have a normally distributed lifespan, with a mean of 6.7 years, and standard deviation of 2.1 years. If you randomly purchase 2 items, what is the probability that their mean life will be longer than 9 years? Question Help: @Video Message instructor

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