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07-01-2017
Mathematics

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The weights of grapefruits of a certain variety are approximately normally distributed with a mean of 1 pound and a standard deviation of 0.12 pounds.use scenario 6-9. what is the probability that the total weight of three randomly selected grapefruits is more than 3.4 pounds?

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MissPhiladelphia MissPhiladelphia

21-01-2017

We are given with the condition that
x > 3.4 lb
The mean is 1 lb
The standard deviation is 0.12 lb

The z-score is
z = (3.4 - 1) / 0.12
z = 20
This corresponds to a probability of 0.842 or 84.20%.

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